Uh, have a talk with South African whites sometimes.

And isn't American Deep South, with its 30-50 per cent black population, considered stereotypically racist, while you have a lot of anti-racist movements in mostly white places like Oregon and New England?

It does not work in Europe either. For example, the far-right Rassemblement National has most support on the French Riviera and Corsica, places where the Arab and African populations are very numerous. It struggles to gain support in Bretagne, where there is little immigration.

Israel is very diverse and the level of ethnic and religious violence there is massive.

I am Slavic myself; traveling around former Yugoslavia, I heard things that would absolutely stun American readers. There are people absolutely ready to slit throats of the villagers two kilometers away, just because of a different religion.

From your comments, I hear the conviction that upon meeting people from a different culture, everyone will rejoice and cherish the changes. You do not take into account a possibility that two cultures may, upon contact, develop a serious conflict, perhaps even ending in war.

Diverse places like Northern Ireland, Yugoslavia, former USSR, the Caucasus, Lebanon, Iraq or lately Western European metropoles seem to be a hotbed of conflicts.