Yes, I agree about the website, but using the belief in an invisible being who wants you hate gays to discriminate against them is childish, pure fantasy, and not dignified of a free society like ours.
I just finished saying that we
don't hate gays. I can't speak for other religions, but Christianity teaches to love others, even our enemies. Obviously you're an atheist, so I guess it's understandable that you have such a warped idea about God. Loving others entails truth and honesty. It doesn't mean supporting everything that person does. For example, I can love someone who is an alcoholic, without loving all of their actions.
You talk about a free society, but you want to take away the right of a private business owner to create art according to his conscience. There is nothing libertarian about that, at all. It is dictatorial and anti-freedom.