i'm saying nurture all the way. i don't think it is in our genetic makeup to produce genocide. naturally anyone of us has the ability to kill someone in a means of protection, but to wipe out an entire group of people is not built in someone's genetic structure. one has to put some sort of thought into mass destruction. it is in my opinion that once a person starts thinking about the most efficient way to kill millions that that becomes a result of your environment. himmler had to rationalize killing all those people, and how a person rationalizes is a result of their upbringing, social conditions, and culture.