Earlier quoted context omitted.
The world is so weird. I never understood the motive behind tyrannizing other people. How is that winning at anything other than being an asshole? Why don't people just leave other people alone? Is it so much different to tyrannize a woman for being feminine, or just being attractive? Most of us are instinctively disgusted by that--or at least claim to be?
Homosexuality is disturbing to people because their brain cannot find relevant patterns that have to do with homosexuality-related experiences (sights, images etc). And when the brain doesn't find good pattern matches, it alerts the person of something very strange and potentially dangerous going on. Morality systems come on top of this fundamental fact, because morality systems are just the conscious justifications…
Just looking at same-sex marriage allows you to clearly see correlations in approval of same-sex marriage based on religious beliefs: http://www.pewforum.org/religious-landscape-study/views-abou...
Beyond the differences between a number of the religions, You can look at the results for "Sources of guidance on right and wrong by views about same-sex marriage". The clear majority of those who oppose it do so based on religion.