The political or religious fantasy of all people being the same and all getting along in the same space simply does not work

Racist attacks will continue in a multi-racial/multi-ethic societies because human nature is racist and ethnocentric and has been since humans became humans, and even before that; it was genetically programmed into human nature because that kind of group-solidity helped humans survive and reproduce successfully in a very tough world. No amount of political propaganda against it has stopped it, not even religion has stopped it (some religions even encourage it).  

That is why ethnostates and ethnopluralism is advocated. You cannot jam different racial/ethnic groups together in the same space and expect them to get along, even if human nature is flexible enough to try to do it in a perfunctory way for a short time (or is forced to do it).  Calling it evil has not and will not stop it.  Multi-racial/multi-ethic programs, like Soviet communism---and now cultural Marxism in the U. S.---always soon break back down into ethnostates. In any case, racial/ethnic groups usually move to their own ethnic neighborhoods where they feel more in harmony no matter what they are told in the Media or in school.

The political or religious fantasy of all people being the same and all getting along in the same space simply does not work, and it is long overdo time to admit it. That is why ethnostates and ethnopluralism is advocated, which could even be adapted to the constitutional separation of powers and states in the U. S., and federally protected. If we really want peace and harmony that is the best we can do.