I don't understand why this would matter. Why would homogeneity of the population have anything to do with how many people the police kill of the privileged race? Does the existence of black people in America increase the number of whites killed by police?
When we compare crime and such between USA and Europe you always say "But USA is so diverse!", isn't that racism? I mean, you are basically saying that you have to live with crime, murder and such when you have a diverse population. Or do I misunderstand you?