Religion's prime flaw.

They cannot comprehend the idea that some things they may never find an answer to.

For example.

How old is the earth? I don't know. All I can say is "there is evidence to suggest how old it is".

Religions aim to find people who are stupid enough to believe in things without evidence, so they claim to have the answers to such questions and when someone shows interest it means they are impressionable and can be used.

If gay comes from nature, it is made from the devil and there is a cure. If it comes from nurture, then it's proof that gays were all raped by their parents and they'll continue the cycle because they can't have kids on their own. Nevermind that monogamous heterosexuality is the least common relationship in the animal kingdom or that if homosexuality is banned we may also ban all esthetical preferences such as liking wine or E Nomine.