I am of two minds about this.
One part of me says "I disagree with your view of the world, therefore I don't like you much."
The other says "there's nothing to do with those views in the games that I've played. If he's not trying to preach, why prevent myself from getting an enjoyable game which has nothing to do with those views I'm not keen on." The same part of me says that even though I don't agree with his views, he is perfectly entitled to have them, I'll just think he's an idiot and ignore him. It's got nothing to do with the game.
Of course, nothing says "I disagree" like not buying the product on the basis that he is involved. But if you start doing that where do you stop? He's more high profile than, say, the heads of Asda (or Wal-Mart), but I'm sure if you looked close enough you'd find something to dislike with someone up there.
EDIT: Perhaps scientology is a better example. I think it is dangerous and exploitative to those at the lower levels. Would I ever not go and see a Tom Cruise or John Travolta etc etc film just because they are proponents of Scientology? No.