The rationale for or against the existence of God is the same. You know this thing called 'life'? Imagine a bubble that exists in a bathtub called 'time'. Life is that bubble, and when it pops, that's all she wrote. So use your time wisely gentlemen. Keep asking questions while you can.
About homosexuality: Just because I find someone socially revolting doesn't mean that someone doesn't find me socially revolting. And some people argue that homosexuality is more than aesthetic choice. Either way, there's no way I'm a fucking superior human being, so I give homosexuals the respect I would give anyone.
Secretly I think that many people can't socially stratify homos and therefore feel threatened. ("What if I want to suck cock?")