Here is the granite/alwight/arthurbrain line of thinking: Homosexuality is strongly genetically based and is therefore a natural disposition. They cannot help their homosexuality and therefore they have an excuse for their behavior. Since two men or two woman engaging in sexual acts with each other, generally does not hurt anyone directly in the immediate timescale, it should not be condemned. I suppose that if God does not exist in your mind or you could care less if his moral laws are upheld then you probably would get your hackles up when someone tries to say there is something wrong with it.
That pretty much describes my view on the topic as well. I don't see sexuality as a choice. Even if someone who is born heterosexual or homosexual decides to remain celibate, it doesn't change their sexuality.
I am not so much opposed to Christians believing or claiming that homosexuality is wrong. It's an opinion and we are all entitled to hold our own views.
What I do, however, have an issue with is advocating the death penalty for homosexuality. It is overkill and frankly violates the right to practice or reject religion.
Also, the constant claims that all homosexuals are pedophiles are intentionally dishonest to say the least. There is too much venom from certain individuals when discussing this topic ... enough to cause total rejection of such arguments.