Okay, get this:
Imagine your in Austria around the time Arnold was young. Think of what their opinons of Hitler were like then. I can tell you this: I highly suspect there would be people very supportive of Hitler and were not quiet about that fact.
I'm not saying Arnold is a nazi sympathizer. Far from it. What I'm trying to say is that in his life he's seen people espouse the good and the bad and made his own decision. In the lives of most Americans in this day and age, we hear of only the bad. Anyone who speaks good of Hitler is a weirdo/skinhead/whatever. This is almost assuredly the way it ought to be, since Hitler is the most evil man in history.
God, it should be blatantly obvious to you by now, but it isn't for whatever reason. I had a finish-up for this post, but lost my train of thought when my Dad started blasting the TV really loud.
The point is this: A person who grew up in a Nazi-controlled country probably has a lot different experience about the whole damn thing than someone who just reads about it in history books. I know there's a better way to express this, but I can't think of one. The point is that Hitlers and Nazis are probably more of an open subject there at that time than it is here and now.
If you still don't understand, you're a fucking rock. It's as fucking relevant as:
And hey, he has ties to some guy with a shady past of anti-smetism. All in all, I think the guy doesn't support Hitler or the Nazis, but is probably more open to talking about it because of the culture he grew up in.