In the 1970's Boston schools were still functionally segregated. A policy of desegregation bussing was introduced

A group called ROAR (Restore Our Alienated Rights) opposed this. They were racists but it was unfashionable to own that label at the time.

Instead, they argued that it would deprive parents of their right to choose their child's school environment.

Yet, with redlining and so on, choice was realistically mainly for White parents. They simply didn't want to share their power.