Can you please link the source?

School busing for the purposes of desegregating school districts was something that developed in the aftermath of the Civil Rights Movement; and white people fucking hated it. They rioted all over but especially in places like Boston. In other parts of the country private evangelical schools (not explicitly segregated but de facto, as these were and still are often nearly 100% white) exploded in popularity.

The courts were able to keep these desegregation programs in place through the 70s and 80s, but the white folks were relentless in trying to get them overturned and by the time you get into the 90s, they had been pretty successful in rolling back this one meager form of progress.