early christians were persecuted for their beliefs. which belief in particular made others suspicious of…

Brief Explanations:

In the Roman - dominated world, religion was closely tied to the state. Early Christians' refusal to worship Roman gods was seen as a threat to the social and political order, which led to suspicion and persecution. Belief in the afterlife and that Jesus was the Son of God were internal religious tenets not as directly threatening to the Roman establishment. Acceptance of Judaism was not the main cause of suspicion as much as the rejection of Roman deities.

Answer:

their refusal to worship Roman gods