Well lets see. Jesus advocated mercy and kindness, and instituted a religion based on respect for one's fellow man and on respecting the boundaries between church and state.
The Emprah went out and arranged for the slaughter of anyone who didn't bow on their knees to him, or who refused to abandon their faith, and crowned himself presidente for life. He sent his followers to annihilate entire human worlds for defying his will.
Also, you know, commissars?