Answer: Christians were blamed for the desperate situation because they denied the gods who were thought to protect Rome, thereby bringing down their wrath. To regain divine protection, the emperors introduced the systematic persecution of Christians throughout the empire.
Explanation: By approving Christianity, the Roman state directly undermined its religious traditions. Finally, by this time, Romans considered their emperor a god. But the Christian belief in one god — who was not the emperor — weakened the authority and credibility of the emperor.
The Christians were fighting the Romans against persecution and abuse, they also converted Romans to Christianity and Constantine was converted and stopped the violence.