That's a mighty fine line to draw. Let me offer an analogy.
Suppose a woman goes to a bar and is sexually assaulted. Suppose that, after the fact, an observer comments that, well, she was dressed rather provocatively, and she probably shouldn't have been in that neighborhood anyway. At what point does this cross from a "study of human beings and their responses" to blaming the victim?
I understand your point, malakhi - I was only hoping to point out that there is a major distinction between suggesting Hitler was correct in his prediction of a cultural reaction to something, and saying he was morally "right". I think the argument being made was the former, but you seemed to interpret it as the latter in your post.
I was simply offering that I read it as the former.