Probably a combination of those plus factors we aren't privy to.
I don't really know how to take the measure of a man and probably I'm not qualified to. I don't think he was evil though. People are complicated and not at all black and white.
Believe it or not, he was a pretty good academic at one point.
I saw him in an interview with channel 4 news in the UK where the reporter boorishly tried to trap him constantly, to no avail. But just as you think, 'this is a smart guy', he begins to get incredibly smug and totally insufferable. The guy is a bit of an enigma. Mixed in with the rubbish there are some interesting ideas...