Honestly, it depends on the person. I think to a certain extent a lot of really great artists are assholes who say/believe/do terrible awful things. Hell, I think to be a GREAT artist, you have to be fucked up in some ways.
That being said, I probably won't go see Ender's Game. I read all of the books (at least on the Ender's side... never got around to the Shadow series) but that was a long time ago. Not giving OSC my money is sort of just a perk - I just honestly have no desire to see it. All I can say is that I hope people enjoy it, and that it isn't awful.
Also Hitler's paintings weren't that good.