It seems pretty straightforward: we are capable of great benevolence to people we view as our "tribe", and great cruelty to "others". It makes sense biologicall

It seems pretty straightforward: we are capable of great benevolence to people we view as our "tribe", and great cruelty to "others". It makes sense biologically and has played itself out that way in history and among our closest animal relatives. That being said you only get one life, and most of your views will go unchallenged throughout it. Why spend that brief time always assuming and preparing for the worst?