Why?

The Nazis and Hitler felt that they need to eliminate many different types of people because they were afraid that the people would overthrow them by having different kinds of people that were good at different things and would gather together and rebel. Another possible reason that they felt that they needed to eliminate different kinds of people just for fun. They are "famous" for being cruel and doing things that normal people wouldn't think about doing. Things that they do are unpredictable, so they might just kill the different people so that they could see different reactions from them. I think that having fewer different people or more different people doesn't really matter to me. But if I really had to choose, I think that having more different kinds of people will be better. Not matter if there are many or less kinds of people, humans just have conflicts all the time. If there are less different people, they might all like the same things, and fight over things, but when there are many different kinds of people, they might not like each other when they find out that one doesn't agree with what one another says or likes. The diversity of people doesn't make any difference. But having more different people will make life more fun and exciting and vice versa.