Maybe too subtle or pseudo-clever.  How about the "leviticus gene", an organic origin for what was once attributed morally defective behavior? If you spend time with a kid on the autism spectrum, you will soon become annoyed with behavior that is not really the kid's fault. I honestly expect homosexuality, and all other sexuality for that matter, to one day be considered in the same light. And as far as bigotry, hate, and disliked others, if you don't consider all behavior to have a genetic component, you haven't been keeping up with your reading.