Nonsense, ghettos don't just appear. They are forced into them. Just as the powers that be have pushed cultural diversity upon us, so too they have herded certain kinds of people into ghettos with cultural engineering including such control measures as who gets cheap loans and who can't get loans. In this way they managed to take strong Polish, Italian, Irish, etc neighbourhoods of major cities and move them out the non-tight bland "communities" of the "white" suburbs where they have nothing in common but their lawnmowers. Part of the push out of the city was organized welcoming of "other" communities into their formerly strong communities. Much like Europe is having immigrants forced upon them now - except there's no "white" suburbs to retreat to.

I agree that forced cultural diversity is terrible to all involved, other than the ruling class who aim to divide and conquer.

Your title is about skin colour. That "racial" error is on you if you meant "culture".