The holocaust

I think that the holocaust was a major event that had to happen in history because then people can now see how dangerous discriminating people can be. But why do things have to go that far for people to see that everybody is the same and has equal rights. The same ideas that happened in the holocaust are still happening today. Different kinds of people are still being discriminated and pushed away because of how they're, how they live and what kind of things they do and believe.