Why did the roman empire not tolerate christianity

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Roman tolerance did not extend to religions that it perceived as threats to public order within the empire. Cults such as Isis-worship were banned from time to time, when their practice caused unrest. Judaism was widespread throughout the empire, but its exclusive monotheism combined with a strong nationalist ideology in Judaea itself led to conflicts with, and ferocious revolts against, Roman authority - although these were bloodily repressed.

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