> And lets be honest most actual genocides are committed by smart(often very moral) people acting on irrational fears or dreams of an utopian future that can only happen after the world is purified of some specific evil.

People who commit genocide to try to establish a utopia are not moral. They may be "moral" - that is, they may claim adherence to a moral standard, and be able to articulate it and defend it - but they aren't moral. In D&D terms, they're lawful evil. But they think they're lawful good, because they are following their moral code. They never stop to think that, if their moral code calls for killing all these people, maybe they should be questioning their moral code.