Read the article linked in that link, even he comes straight out and says "This is in no way a Hitler biography." It's a bad sign when your linked citations contradict your point. The rest of it is an anecdotal and largely unrelated mess, you can scroll farther down for some of the responses to it.

I think OSC's political positions are nigh idiotic, and frankly confusing given the very reasonable positions he presents in some of his books. E.G. Homosexual characters in his books are not society destroying monsters. Yet even given that you're still overstepping sane literary analysis when you start the Hitler biography bullshit. Attack the man on his politics all you want, his positions are easy to verify and highly public, just leave the stupid smears to die.