It is frustrating to see some people still resenting the fact that gays exist. I think the question of whether it's a choice or not should be irrelevant. Gays are there (in a very very large number) and they're there for good. The Western societies have long realized that they can't undo it, and that the only way forward is to embrace it as a valid community or subculture (if you think that it's a choice). Is it hard to accept at first? Probably.