Re-segregation is a viewpoint being taught in Black Studies courses in colleges and black online spaces such as "Black Twitter" (yeah, now "X").
I've had plenty of discussions with young blacks as to how absurd their call for re-segregation is.
The first thing they don't understand is how segregation was not working for us in the past. Most look at a couple of gross statistics and conclude "we were doing just fine with segregation." Yes, there were more black businesses and the marriage rate was higher. However, the way white racism managed "separate but equal" was to make sure "separate" never became "equal." Some of those ways were economic, some of those ways were legislative, some were just a flat resort to violence.
For instance, whites were perfectly fine with a black man owning a barbershop or a funeral home; whites didn't want to provide that kind of personal service to black people anyway. But if that black man went to the white bank for a loan to expand his business to additional locations...no, that was not going to happen. And even though there were a few black banks, white policies and legislation made sure those banks were not large enough to support a black pharmacist growing into another Walgreen. Black segregated housing was an easy target for reduced services and negative zoning impacts.
When I was a teenager, we lived in an area of town that had been opened as a "middle class" area for blacks in 1960 while housing segregation was still the law. Doing that took a great deal of economic and state-level legislative wheeling and dealing by the developer, because the city did not want such a thing as a middle-class neighborhood for blacks. The neighborhood was located on the south edge of the city, with an expectation that city expansion would grow to envelop it. How did the city respond? They put in an airport on the west side, low-income projects on the north side (cutting it off from the city), and a prison on the east side. Cities put freeways through the black areas, landfills next to the black areas, noxious industries next to the black areas.
Black people did not call for integration out of some desire to sit next to white people in restaurants, black people called for integration because being "separate" made us easier targets. Racism made segregation non-viable for black people.
Young black people today believe white people are just as racist now as they were back then...no improvement. Yet, they don't understand why the parents of black Boomers pushed for integration in the first place. If whites are no better now than before, then re-segregation won't work any better now than it did before. Their re-segregation
depends on whites being better people now. But if whites are better people, then re-segregation is not necessary.
But it's got to be understood that re-segregation only makes sense within the framework of critical race theory, which argues foundationally that white people will never change, and social power must be wrested from them so that they can be effectively oppressed to social insignificance.