A point that's been brought out is how many people switch between having sex with both males and females. Yet again another difference. If we can't strictly define the causes behind homosexual behavior and can see examples of people who go back and forth, then sexual preferences (or fetishes as I see them) can be fluid.
For example, a person may like head. But they don't need head in order to get a nut. They may enjoy it immensely but they can also enjoy sex without it. Similarly, I think there are people who get off on the rush of sleeping with the same sex, because of the taboo. They don't need to, but they like the rush. Society has convinced people that this is an integral unchangeable part of who they are, so you have people with homosexual tendencies damn near about to commit suicide and treating their rush addiction as if it's some epic struggle for love, justice, and personal freedom.
I don't buy it. Homosexuals at the end of the day cannot be targeted for anything other than their actions.
To those who say individuals wouldn't make their lives harder on purpose, I counter that by simply pointing out the fact that people engage in self-destructive behavior all the time for the sake of pleasure or reward.