In various parts of the country, educators who have succeeded in raising the educational level of minority children to the national average — or above — have faced hostility, harassment or have even been driven out of their schools.

Not all charter schools are successful, of course, but the ones that are completely undermine the excuses for failure in the public school system as a whole. That is why teachers’ unions hate them, as a threat not only to their members’ jobs but a threat to the whole range of frauds and fetishes in the educational system.

The autonomy of charter schools is also a threat to the powers that be, who want to impose their own vision on the schools, regardless of what the parents want. Attorney General Eric Holder wants to impose his own notion of racial balance in the schools, while many black parents want their children to learn, regardless of whether they are seated next to a white child or a black child. There have been all-black schools whose students met or exceeded national norms in education, whether in Louisiana, California or other places around the country. But Eric Holder, like Bill de Blasio, put his ideology above the education — and the future life — of minority students.