You can't just get rid of whole groups of people you don't like or don't get along with. You have to learn to live with them. And you don't even know all of them. You can't. It's not possible. So, you don't even realize that you are one of them. There is a YOU in the group of people. And if you become a part of a people who is willing to do this kind of thing? There is nothing to prevent you from being next. Because you exit humanity through that door.