Unless you have living in a deep cave for the past 25 plus years you would know that the public government school system is a complete total disaster. And the people that run these instutitutions are mostly extreme leftist socialist, and big government hacks. Did I cover everything for you?
History is a case of he said, she said.
Even the theories of hard science, which rest on more rigorous proof than ever we can subject history to, stand only for a moment.
You teach the version of history that makes your society strongest.
Teach a version that weakens your society, and your society perishes.