The problem is the truth they teach now is propaganda rather than than the real history. Politicized education is a huge problem in the US, professors want to teach what they believe rather than promote individual thought on part of the students.
it is hard to find neutral teachers/professors, they are already brainwashed somehow. I remember having a literature professor that used to be that root communist trying to spend 20% of the time criticizing the current government at that time which was more center-right. That's why I cited that history teacher that somehow he tried to be neutral everytime. We never knew if he was a more right or left person, and if we asked which Brazilian soccer team he used to cheer, he always answered that it was "Olaria". Olaria is a third-division soccer club in Rio de Janeiro that for sure he wouldn't cheer.