Exactly. As I've once said on a certain other forum, anyone who at least understands what the disasters of the 20th century have meant for our image of ourselves will be aware of, and likely resigned to, getting one's reasons to act on the world from the same source as the Nazis or whoever one most despises. No matter how reasonable the actions and the surface reasons might be, the meta-reasons are always going to be instincts, cultural assumptions and self-deception.

All in all, only Konkvistador's stronger proposition, on which I commented above, is in any way disturbing to me. And I even manage to mostly excuse the believers in moral progress; my reasons for that are a complicated story.