If I let an author's/actor's/musician's politics get in the way of my enjoyment of a particular book/movie/song I'd hardly ever read/watch/listen to anything.
That said, I think there is little hope that an acceptable movie adaptation can be made of Ender's Game in today's Hollywood. I mean, it looks like they showed the destruction of the bugger's homeworld in the trailer. WTF?
Still, as one of my top 10 sci-fi novels, I hope it's awesome!