Indeed.

d. Intolerance and exclusiveness of Christian religion and society. The Christians contravened the tolerant eclectic spirit of the empire by the absoluteness of their religion and the exclusiveness of their society. Christianity admitted to no compromise, and was intolerant to all other systems. The Christians could not deviate from the teachings and commands of their Master, the Lord Jesus. To maintain their own life and mission they had to be intolerant. Many would gladly have accepted Christ along with Mithra and Isis and Serapis, but Christianity demanded complete separation. Christ could have no rival. His religion claimed to be absolute, and worshipers of Jesus had to be separate from the world. This spirit was at enmity with that of the day, which enabled rival cults to coexist with the greatest indifference...

...

f. Aggressiveness against pagan faith. Not content with abstaining from other worship, the Christians attacked severely the pagan cults, which to them were based on the doctrines of demons. Emperor worship was blasphemous to the Christians, and they were charged with disloyalty and could be proved guilty of majestas (treason). They treated with contempt the claim that the greatness of Rome was due to her reverence for the gods. To the Romans they were atheists, and the politicians feared that this atheism might call down the wrath of the gods.

Reference: The International Standard Bible Encyclopedia, Volume 4 by Geoffrey W. Bromiley, page 214