Science is based on fact. I don't know what causes homosexuality and I really could careless. I do know that most scientists that I have known do not seem to be particularly religious. This is just my observation I realize, but it is my personal experience.
I grew up in a Fundamentalist Christian School in Castro Valley, CA. I was fed the dogma from the age of 7 to 14. I remember being a little kid and believing all that you believe, but something did not add up. All my friends were devout at school and crazy sinners when they got home ( not crazy, but you get my drift). I still feel as though a lot of Christians say what they should, but act different when they are away from church. It is frustrating.
I am sorry I guess I rambled as I tend to do. I guess if I don't believe in the Bible we won't be able to agree on much, but at least I get where you are coming from. I wish I could change that Bible of your a little!