> they don't want their kids being part of a failed social experiment.

Indeed. You don't see much investigation on the consequences of these experiments; the state is rarely introspective. If there was any bigger accelerant to the white flight phenomena in the 70's than the `integration' experiment I've never heard of it. It went all the way to the Supreme Court and when it was decided that Detroit (and therefore many other big urban school districts) couldn't force surrounding suburbs to participate in the experiment (Milliken v. Bradley) the fate of that city and many others was sealed.