It's also human nature to become murderously violent about various things, and to grab a club or bone and use it as a weapon to kill someone you don't like or b

It's also human nature to become murderously violent about various things, and to grab a club or bone and use it as a weapon to kill someone you don't like or because they have something you want. Humans managed to create "civlization" and "laws" and "police" to curb this negative part of human nature. I don't see "human nature" as an acceptable excuse for anything at all.