What would you say is a good way to end this way of behaving?
My God ! This is a megabig question. Divine religions supposed to lead people towards peace. Unfortunately the the religions were falsified and distorted or misinterpreted. Not all people are going to believe in a God or in one god. Humanity needs a commonweal Pact to set guidelines for mutual coexistance under the auspice of impartial pioneers. The UN was supposed to play such a role but superpowers police the world under biased judgments and greedy interests. I Thing no peace is expected before the advent of the Messiah peace be uppon him.