Sure the particular units might not be considered evil but what Imperium does pretty much is. Xenos ? Purge without question, even if they are peaceful Human

Sure the particular units might not be considered evil but what Imperium does pretty much is. Xenos ? Purge without question, even if they are peaceful Human colony wanting to be just left alone ? Nope, can't have that, conquer and make them pay tribute. Mutated in wrong way ? Probably chaos, purge just in case. Human rights ? Only human right is to sacrifice life for Emperor. Sure the world requires such level of sacrifice just to survive the threats from rest of the universe but that doesn't make Imperium not evil Then again, every other major faction is too... maybe except Tyranids, they just hungry