That's totally true. I think it's because most public schools are financed through property taxes, with wealthy suburban districts often having very good public schools, and poor urban districts poor schools. The suburbanites might be mostly liberal, but they don't want to share their property taxes with the poor urban schools, lest their own schools, and kids, suffer.

Which engenders the silence. The property tax system of school finance is the problem. It should be changed, somehow.