I’ll add, imo, the people who are 1st, 2nd or 3rd plus generation Americans, that descended from Europe, in general, are well behaved and don’t kill other people. In general, the people from less developed hot weather countries, are the opposite. Simply behind the times.
In the beginning, in the cold weather countries, you had to be smart just to keep warm produce food and survive. Plus they invented sailing ships to travel. In hot weather countries, they can be dumb and survive with fruits and vegetables just growing wild.