Most CHUDs didn’t go to underfunded intercity schools with moldy textbooks. They went to well funded suburban middle class schools which, yeah are still US public schools, but still provide better educational opportunities than what most people in the world have.
CHUD aren’t fascists because their social studies teacher was underpaid, they’re fascists because fascism speaks to them and their values. They are fascists at the end of the day because they like being fascists.
And further more, unless you embrace full hard determinism, you have to view these people as culpable to some extend for the awful politics they support. Yeah, none are immune to propaganda, we are shaped by are culture yadda yadda. But I have to think humans have some capacity of will to rise above their social conditioning, if they’re willing didn’t society would never evolve or change for the better.
It’s interesting that liberals refuse to see the school system as a tool for propaganda, they are generally not saying schools should teach more liberal values, but instead have a vague idea of “more better schooling = more liberal electorate.” The reactionaries have no problem seeing the propaganda potential, although they are very wrong about the current state of that propaganda.
But yes, the problem with education as a solution to social problems is that the idea is too all-powerful, it is very easy to end up with an extremely one-sided theory that has no actual praxis.