"Ethnic Diversity"

Very few rational people would argue that diversity is a bad thing. In fact, Darwin says that it is variability that drives evolution. In terms of organisms, humans are probably the smartest. This leads me to believe that it is only out of hate that we try to eliminate our own diversity. Genocides are bad. Any ethnic cleansing should immeadiately catch the eye of the global community and be stopped, it makes me wonder why there has been no response to some of the attrocities currently going on...