I'm sorry, but your arguments are weak and seem uninformed. What does Pol Pots thoughts or opinions have to do with facts. His regime rided the society of educated people. As this one seems to want to do, by the way.

Facts are facts and lies are lies and even if the majority believes the lie - it does not change the facts.

Recorded history is, of course, subject to human fallicy. This is why it is correctible.

the problem is, one man's facts are another man's lies, outside of very generic history facts like caser was killed in X by X. 

Pol Pot thought he was a great guy until he died and didn't think he did anything wrong. People will say Stalin was a great leader and nobody can agree on how many deaths he caused, or if he caused them

stack_harder

Education

Purpose of Education

cryotosensei

It is as hard as any other science. All science is only as relevant as the currently known facts. It all adapts and adjusts over time. It is called progress.