IF
Homosexuality is unnatural, why does it exist.
If God did not intend man or indeed any animal, to be gay, why is homosexuality even here?
I am straight, I personally don't understand how men find other men attractive. And I am sure many straight women ask that about other women as well, however bi and homosexuality is far more common in females than in males.
However do I believe any of us have the right to say what a man or woman can or cannot do, if it doesn't directly effect society? No. Absolutely not.
So what there are gays, so what they can marry? If your straight, and I'm straight, we are going to, or indeed have, found a woman who is similarly inclined and procreate.
Does us finding women attractive make us any better than them, no. It doesn't. We are all human beings, we all feel attraction, we all feel love (except sociopaths). Sure,
some races may be more athletic, some may be more intelligent, some may be more socially applicable. But at the core all men and women are equal.
So to persecute someone, or anyone for who they are... is wrong.