TIL "Oyinbo"
(Today, I learned…)
On a point of pedantry, I would claim that a ghetto is something you - and others like you - are coralled into. The essence being that, in 1930s Germany and the Pale Of Settlement (Russia), it was largely involutary resettlement.
Actively 'taking' an area is just old fashioned colonialism and I don't need to repeat the regard in which the present day holds that behaviour.
Making yourself at home is a normal human thing to do. Extending that to making an area your own is subtly different but it is hard for me to decide where the line between that an quasi-imperialism belongs.
Don't forget that there are predominanty white towns who don't even like the white people from the town just down the road so picking apart which bits of this behaviour tendency is racially based and which is merely territorial is not always clear cut.
Anyway, I'd guess that part of the "right-on" crowd's plan to do away with racial discrimination and harrassment was probably that there would be no 'payback' behaviour. I cannot begin to guess how much of that there has been but will regard this case as exceptional, otherwise we'd be cut'n'pasting old stories already. I may have been 'sheltered' but my sense is that, nobly, we've had next to no payback for things (of this ilk) done to minorities from the 1950s onwards.