Sex is to a person what it is to the society around him or her. Whether gay sex is natural or not the point. The point is whether the religion, culture or society see it as forbidden, allowed or recommended.
Western societies see homosexuality as a normal because it is a norm now for people to choose their orientation. Easter cultures, specially the believers of monotheistic religions, see homosexuality as a forbidden thing and they avoid it. Many of them do not hate homosexuals but they do respect their faith and refrain from it or do not have any inclination towards it at all.
I think it's okay to have a different stance or point of view about homosexuality but it's not okay to have hatred for anyone.
We need to grow maturer as human beings and see things from all the angles, like you described in detail in this post.
yeap. it all depends where you are born.