I had to link to this post by Dorid. It's the most intelligent and perceptive post I've seen in a long time and deserves to be more widely read.
I'm not American so I can't comment on what's happening over there but as an atheist with a gay son, I have become aware of how fragile free speech and tolerance are. Dorid's image of the future is all too credible, and not because the US is an evil or a stupid nation - it could happen anywhere.
I'm not going to say any more - Dorid says it much better than I could. Read and shiver!