When Christianity Looked Like a Cult

Rome burned for six days in the summer of 64 AD.

Fourteen districts of the city, gone or badly damaged, and rumors moved through the ash almost as fast as the fire had. People whispered that the emperor himself, Nero, had ordered it started — that he’d wanted to clear land for a new palace and simply hadn’t cared what stood in the way. The historian Tacitus, writing decades later, records what happened next: Nero needed someone else to blame, and fast. “To scotch the rumor, Nero substituted as culprits, and punished with the utmost refinements of cruelty, a class hated for their abominations, called Christians by the populace.” Tacitus doesn’t even bother explaining who Christians were to his readers, beyond calling their faith “a pernicious superstition.” He assumes everyone already knows exactly what kind of group he means.

That’s worth sitting with. This wasn’t a persecuted minority the wider culture felt conflicted about. It was a group so widely regarded as dangerous and disreputable that blaming them for a catastrophic fire sounded believable to an entire city. Long before “cult” was a word anyone used, outsiders were already treating early Christianity the way suspicious, unfamiliar minority movements are often treated — feared, accused, and assumed guilty before anyone bothered to look closely.

Two of the church’s own founding leaders were almost certainly caught directly in what followed. Scripture itself doesn’t narrate either man’s death — Acts simply ends with Paul still under house arrest in Rome, around 60-62 AD, roughly two years before the fire. What happened afterward comes entirely from historical tradition outside the Bible, and it’s worth being explicit about that rather than blurring Scripture and tradition together. Clement of Rome, writing within a single generation of the events, and later Tertullian and Eusebius, converge on the same account: both Peter and Paul were executed in Rome under Nero, likely in the persecution climate that followed the fire, sometime in the mid-to-late 60s AD. Paul, as a Roman citizen, was beheaded. Peter was crucified — the detail that he requested to be crucified upside down, feeling unworthy to die the same way as his Lord, comes from a considerably later and less certain source, and is worth holding more loosely than the core fact of his execution itself. One ancient writer, Dionysius of Corinth, speaks of the two men suffering martyrdom in the same general period — supporting the tradition that both died in Rome under Nero, even if it doesn’t necessarily mean the exact same day or event.

 

Why Refusing to Worship Felt Like Treason#

 

To understand why Rome reacted the way it did, it helps to understand something about the Roman mind that doesn’t translate easily into modern categories. Roman religion wasn’t primarily a matter of private belief. It was a civic technology — a system of correct rituals, correctly performed, that were believed to maintain something the Romans called the pax deorum, the peace of the gods. Keep the gods properly honored, and the gods kept the empire safe, the harvests good, the armies victorious. Neglect that duty, and disaster wasn’t a coincidence. It was the gods withdrawing their favor from everyone, not just the person who’d failed to honor them.

Rome’s empire was also religiously additive, not exclusive, which is why this specific group stood out. Conquer a new territory, and Rome was perfectly happy to declare the local god just another version of one already on the shelf — your river god was simply their Neptune under a different name. Keep worshiping him, just also make the expected gesture toward the emperor and the recognized gods. Even the Jewish people, fiercely monotheistic and also refused to sacrifice to Rome’s gods, were granted a specific exemption — Rome respected antiquity, and Judaism was old enough to earn a negotiated arrangement: pray for the emperor to their own God, rather than sacrifice to him directly.

Christianity had neither protection. It was new, which Roman culture treated with suspicion rather than curiosity, and it was uncompromisingly exclusive — Jesus is Lord, full stop, with no shelf space offered to Jupiter alongside Him. That’s the frame that makes sense of an accusation that otherwise sounds bizarre: Christians were called atheists. Not because they denied a god existed — they insisted on exactly the opposite, with more conviction than almost anyone around them. They were called atheists because they refused to honor the recognized gods, the ones the whole civic system depended on, and in a worldview where correct worship kept the entire community safe, that refusal wasn’t a private eccentricity. It was read as an act that endangered everyone.

Layer onto that the specific things Christians actually did, filtered through people who’d never been allowed to observe them directly, and the rest of the accusations almost write themselves. Christians spoke of “eating His body” and “drinking His blood” in their gatherings — language rooted directly in Jesus’s own words at the Last Supper (Matthew 26:26-28) and earlier, when He told the crowds that whoever did not eat His flesh and drink His blood had no life in them (John 6:53-56). Overheard secondhand by outsiders and stripped of any theological context, that language sounded like a confession of cannibalism. Christians also called each other “brother” and “sister” — language the New Testament itself uses constantly (Romans 16:16) — shared a “love feast” together, and greeted one another with a holy kiss, a real, documented practice (1 Peter 5:14; Jude 1:12). To outsiders already primed to suspect the worst, all of it sounded like a cover for incest. And they met before dawn, in private homes, deliberately away from public religious life. To a culture where secrecy itself was often the first sign something illicit was happening, that alone was damning.

It’s worth being precise about what that secrecy actually was, and wasn’t. Christians met privately because gathering openly could get them arrested — not because the gospel itself was a hidden teaching reserved only for insiders. Jesus said so directly: “I have spoken openly to the world. I have always taught in synagogues and in the temple, where all Jews come together. I have said nothing in secret” (John 18:20). Decades later, defending himself before a Roman official, Paul made the identical point about the movement he now led: “This has not been done in a corner” (Acts 26:26). The meetings were private. The message never was.

 

A Governor Who Genuinely Didn’t Know What to Do#

 

Not every Roman official approached this with Nero’s cynicism. Around 112 AD, a provincial governor named Pliny the Younger wrote directly to Emperor Trajan, genuinely uncertain how to handle Christians brought before him. Part of what forced his hand wasn’t purely theological — his letter suggests real economic effects too: temples in his province had been deserted, festivals neglected, and sacrificial meat had found noticeably fewer buyers as more people converted. It’s a pattern Scripture had already documented decades earlier and on a larger scale, in Ephesus — where a silversmith named Demetrius, watching his idol-making trade collapse as Paul’s preaching spread, warned his fellow craftsmen that “not only in Ephesus but in almost all of Asia this Paul has persuaded and turned away a great many people” and that their trade was in real danger of coming into disrepute (Acts 19:25-27). Christian conversion threatened pagan religious economies directly, and that threat produced real, organized backlash more than once.

Pliny’s letter survives, and it’s worth reading for what it actually says, because it’s more measured than the wild rumors suggest. He describes what he’d actually learned by interrogating former Christians — going so far as to torture two women serving as deaconesses to extract what he assumed would be a confession of the rumored depravity. What he found instead: they met on a fixed day before dawn, sang a hymn “to Christ as to a god,” and bound themselves by oath — not to any crime, but “not to commit theft, robbery, or adultery, not to break their word, and not to deny a deposit when called upon to restore it.” Pliny couldn’t find the depravity everyone assumed was there. What he found, by his own account, was “nothing beyond a perverse and extravagant superstition.”

That outcome is almost exactly what Peter had already told scattered believers in that same region to expect, decades before Pliny ever picked up a pen. Writing to Christians across Asia Minor — the very province Pliny would later govern — Peter urged them: “Live such good lives among the pagans that, though they accuse you of doing wrong, they may see your good deeds and glorify God” (1 Peter 2:12). Pliny went looking for depravity and found honesty instead. That wasn’t an accident. It was the specific outcome Peter had told his readers to aim for, generations before a Roman governor ever tested it directly.

Trajan’s reply is almost as telling as the letter itself. Christians shouldn’t be hunted down, he says — but if they’re formally accused and refuse to recant, they should be punished anyway. Not because Rome had proof of the rumors. Because refusing to participate in the civic religious order was, on its own, treated as the crime.

 

Labeled a Sect, Tried as a Threat#

 

The label itself became a legal weapon more than once. Decades earlier, when Paul stood trial before the Roman governor Felix, the prosecutor Tertullus opened his case by calling him “a ringleader of the sect of the Nazarenes” (Acts 24:5) — the Greek word behind “sect” here is hairesis, the same root that gives us “heresy,” used by Roman courts specifically to characterize a fringe or subversive religious faction. Paul didn’t deny the label. He simply refused to let it settle the question: “But this I confess to you, that according to the Way, which they call a sect, I worship the God of our fathers, believing everything laid down by the Law and the Prophets” (Acts 24:14). Being called a sect wasn’t the argument. What he actually believed, and whether it was true, was.

And the pressure hadn’t started with Rome at all. Years earlier, after Stephen became the first Christian martyr, stoned by a religious council in Jerusalem for refusing to soften what he preached, “a great persecution broke out against the church in Jerusalem, and all except the apostles were scattered throughout Judea and Samaria” (Acts 8:1). The very first wave of persecution didn’t crush the movement. It scattered believers out of a single city and, without anyone planning it that way, turned a local following into a spreading one. Rome would later discover this same pattern the hard way, on a much larger scale.

 

The Church’s Own Defense#

 

On the morning of March 7, 203 AD, in an amphitheater in Carthage, a crowd gathered expecting entertainment. Vibia Perpetua was twenty-two, a noblewoman, recently married, still nursing her infant son. Felicity was her slave, pregnant when they were arrested together — she gave birth in the prison just days before the execution, specifically so she wouldn’t have to die beside a stranger’s child inside her. Perpetua’s own father had come to her more than once before that morning, begging her to recant, once holding her baby up in front of her as he pleaded. She refused, and in the diary she kept in the days leading up to her death — one of the earliest surviving texts written in a Christian woman’s own hand — she wrote plainly what that cost her: “I grieved for my father’s sake, because he alone of all my kindred would not have joy at my martyrdom.”

In the arena, a wild animal gored both women before guards pulled them back for what came next. Swords were finally brought to finish it. The young executioner assigned to Perpetua was shaking, according to the account — and it says she guided the blade to her own throat herself, steadying a hand that couldn’t steady itself. The crowd had come to watch condemned criminals die. What they watched instead was two women, one a slave and one a noblewoman, facing death with a composure Rome had no explanation for. The historical record is direct about the effect: some who watched that morning, moved by what they’d seen, became believers themselves.

Carthage wasn’t the only place this happened. It happened in arenas across the empire, over and over, for the better part of three centuries — believers led out singing, not cursing the God they were dying for, not striking back at the people killing them, some of them barely more than children. And every single time, some portion of the watching crowd came away asking the same question, whether or not they ever said it out loud: what do these people have that makes them able to face this without breaking? Roman philosophy had no answer to hand them. Rome’s own gods had never asked anything like this of anyone. There was simply nothing else in that world that looked like it, which meant the only place left to look for an answer was toward the very thing they’d just watched being executed. Rome intended each death as a warning, loud enough to frighten the next ten thousand people into silence. Instead, every execution planted the same question in a fresh crowd, and the question kept finding people willing to go looking for the answer. It was never one grease fire, doused once and gone. It was the same fire, started again in a new kitchen, every time someone tried to put it out.

The Christians of that era didn’t simply absorb these accusations in silence, either. Writers like Justin Martyr and Tertullian composed formal public defenses — apologiae — addressed directly to Roman authorities, answering the cannibalism and incest charges point by point, explaining what the Eucharist and the love feast actually were. Tertullian, writing at the turn of the third century, in the same North Africa where Perpetua and Felicity had died, left behind one of the most quoted lines in early church history, aimed directly at those trying to stamp Christianity out through execution: “The blood of the martyrs is the seed of the church.” He wasn’t speaking in the abstract. Killing believers publicly wasn’t erasing the movement. It was advertising it, in front of crowds who’d come for a spectacle and left with a question they hadn’t expected to be asking.

The persecution itself came in real, documented waves, not one uniform three centuries of suffering. Nero’s scapegoating after the fire in 64 AD was localized and brutal but not empire-wide policy. Decius, in 250 AD, went further — issuing an empire-wide edict requiring every citizen to perform a sacrifice before Roman officials and obtain a signed certificate, a libellus, proving they’d complied. Christians who refused, or who paid someone else to obtain a certificate fraudulently rather than actually sacrifice, faced real, organized consequences for the first time on an imperial scale. The most severe wave came last, under Diocletian and his co-emperor Galerius, beginning in 303 AD — a decade-long campaign that destroyed church buildings, burned Scriptures, and executed believers across the empire, right up until the moment everything changed.

 

A Turning Point, Not a Clean Ending#

 

In 313 AD, Emperor Constantine and his co-emperor Licinius issued the Edict of Milan, extending toleration to Christians and returning property that had been seized during the persecutions. Almost overnight, a faith that had been hunted for the better part of three centuries became legally protected.

It’s worth resisting the urge to tell this as a simple happy ending, because it wasn’t one. The Roman state had failed to erase a resilient Christian network that now stretched across the entire empire. Under Constantine and Licinius, imperial policy shifted — not from Constantine’s own persecution, but from the suppression Diocletian and Galerius had waged, toward toleration, and eventually toward active favor. That shift opened a door that hadn’t existed before — the door to political and nominal conversion. Before 313 AD, the cost of joining the church was real: your life, your property, your standing. That cost had, in its own harsh way, filtered out anyone joining for convenience. Once Christianity became not just safe but advantageous — a path to imperial favor rather than a death sentence — an entirely different kind of struggle to keep the gospel pure began, one this piece doesn’t have room to fully trace, but worth naming honestly rather than pretending 313 AD simply solved everything.

There’s a smaller, telling detail worth noting here too. The Greek word the earliest believers used for their own gatherings, ekklesia, wasn’t originally a religious word at all — in ordinary Greek, it meant a civic assembly, the gathering of citizens to deliberate public affairs. The very word Christians borrowed to describe themselves was political vocabulary, used by a movement Rome considered anti-civic to the core. The irony writes itself.

For the fuller pattern of false teaching the apostles themselves confronted from within the early church — Gnosticism, the Judaizing controversy, and the discernment tools Scripture gives for testing any teacher — see Guarding Against Deception: False Teachings and Prophets.

 

The Same Accusation, Turned Around — and the Real Difference#

 

Here’s what makes this history worth more than a history lesson. The exact narrative structure Rome once used against Christianity — you are the fringe, the corrupted, the dangerous deviation from what everyone else already knows to be true — has been picked up and pointed in the opposite direction by a number of movements since, each one claiming that mainstream Christianity itself is now the corruption, and that they alone preserve the original, uncorrupted faith. Being marginal, misunderstood, or accused doesn’t automatically mean a group is right — the same way being popular and comfortable doesn’t automatically mean a group is wrong. Rome’s actual mistake wasn’t suspicion. It was letting suspicion substitute for the slower work of actually looking, the way Pliny at least attempted to.

Scripture itself never treats suffering as automatic proof of righteousness — that distinction matters as much as the one about suspicion. Peter, writing to the same believers Pliny would later investigate, drew the line plainly: “If you suffer, it should not be as a murderer or thief or any other kind of criminal, or even as a meddler. However, if you suffer as a Christian, do not be ashamed, but praise God” (1 Peter 4:15-16). Persecution for actually being a Christian is one thing. Suffering the consequences of real wrongdoing, and then calling that persecution, is something else entirely — and Scripture draws that line explicitly rather than leaving suffering alone to settle the question.

That’s worth naming plainly, because the same accusation now sometimes gets used to dodge exactly the kind of accountability the early church never had the luxury of avoiding. When a modern high-control group, confronted with a specific, documented concern — financial exploitation, manipulation, a leader’s own conduct — responds by claiming “we’re just being persecuted like the early Christians were,” it’s worth noticing what that move is actually doing. It isn’t answering the concern. It’s borrowing the moral weight of a real historical suffering to avoid having to answer at all. The early church’s persecution was never treated by its own leaders as proof of anything — Peter, Paul, and Stephen didn’t point to their suffering as evidence they were right. Their lives, examined patiently over years by people like Pliny, were the evidence. Persecution was the cost they paid for what they’d already shown to be true, not a substitute for showing it. Paul described exactly this posture as the actual foundation of his ministry: “We have renounced secret and shameful ways; we do not use deception, nor do we distort the word of God. On the contrary, by setting forth the truth plainly we commend ourselves to everyone’s conscience in the sight of God” (2 Corinthians 4:2).

And it’s worth being clear-eyed about something else this comparison sometimes obscures: real, severe persecution of Christians hasn’t stopped. According to Open Doors’ 2026 World Watch List — research independently audited by the International Institute for Religious Freedom — an estimated 388 million Christians worldwide currently face high or extreme persecution, roughly one in seven believers globally, with nearly 4,849 killed for their faith in the most recent reporting period alone. That’s real persecution, still happening, to people who are rarely using it to dodge a specific question about their own conduct. The difference was never whether suffering occurred. It’s whether a claim of persecution is being offered instead of an answer, or alongside a life that’s already given one.

 

Why the Accusation Itself Was Never the Test#

 

Here’s the discernment payoff this history actually earns, and it’s sharper than it might first appear. If the accusation pattern — secrecy, unfamiliar ritual, exclusive claims, refusal to integrate with the surrounding culture — was fundamentally wrong when aimed at the early church, then that same pattern can’t be treated as a reliable test on its own, in either direction. Rome’s mistake wasn’t lacking suspicion. It was outsourcing the actual work of discernment to surface-level pattern-matching, instead of doing what Pliny at least attempted and actually looking closely enough to find out what was true.

That cuts both ways today. A group that looks unfamiliar, meets privately, or makes exclusive truth claims isn’t automatically dangerous on that basis alone — the early church met every one of those descriptions and was the truth the whole time. And a group that looks comfortable, familiar, and culturally integrated isn’t automatically safe on that basis either. The actual test was never how a group appears from the outside. It’s the same test this whole discernment work keeps returning to — what a teaching actually produces, tested patiently, against Scripture, over time. “Whoever lives by the truth comes into the light, so that it may be seen plainly that what they have done has been done in the sight of God” (John 3:21). Real faith was never the thing that had something to fear from being examined closely. It was the thing built to survive it.

 

For the practical tools to run that actual test — how to examine a teacher’s fruit, and the full pattern of named deception Scripture warns believers to watch for — see Identifying False Teachers by Their Fruits, and False Teachers and Prophets Named in the Bible.