The attack on public schools started with desegregation. Once public schools desegregated, wealthy whites put their kids in private schools which, at the time, could still segregate. Eventually they were forced to admit minorities, but they realized this wasn’t much of a problem cause they could still keep out poor minorities. With how segregated religion is, making a religious private school is a great way to keep out poor and black students. If that’s not enough, homeschooling gives complete control.