I lived in Mississippi for a bit back in the mid 70s, and went to elementary school there.
The first thing that got my attention was that blacks and white were bussed in on separate busses.
But overall, black students and white students got along fine, I had black friends, and we thought nothing of it.
Desegregation didn’t force people to move. Of course the buses were largely segregated because the neighborhoods were. That’s true of just about anywhere, even still. At this point, absent any sort of compulsion, one might logically conclude that most people prefer to reside in areas with neighbors who are much like themselves. Or, conversely, one might conclude without one shred of logic or evidence that in so doing they’re somehow racist.