It's inevitable that identities will form across groups of people that tend to pit groups against each other. Suppose you're in the position of getting people to do things in a direction mostly together; things will become simpler (if you're in certain countries with youth sports programs) if you get your people together help them feel that other people the people of some other group are the enemy the negative focal point a reversal of your values you fire up people with such a method an active voice for unity! and victory! it's quite a pragmatic approach if you cannot be bothered to pay attention to people and encourage other people to pay attention to each other. Enmity works. Or get it together the hard way.