Well, not sure if being gay helps my argument or not here but I'm with roberth. I don't think that there's a genetic malfunction that causes one to be homosexual but I don't believe it's a choice either. You either are or you're not.

As far as people hating homosexuals goes, they hate them due to ignorance and/or by being intimidated by gays. Human instinct makes us find new things as strange and different. Wee either then decide to accept these new things or try to get rid of them because they're not within our comfort zone. Religion also plays a huge part in this which is where ignorance comes in. In Christianity, the bible states that a man laying with another is an abomination. Well, according the bible, so is eating shellfish. There was also a talking bush whilst on fire.

I'm not some alien creature. People can't even tell I'm gay just by hanging around me. People online also think I'm a girl. So being gay isn't abnormal unless you let yourself believe it is.