I think it’s part of a cultural brainwashing. “Everything you knew to be true is wrong.”
Absolutely right. That's the objective of EVERY Communist, Marxist, and fascist tyranny without exception.
Once they've erased or rewritten the past, they can then install the tyrannical future.
From Stalin to Mao to Pol Pot to Jim Jones and every tyrant before and after. That's the formula and that's how they roll.
Alexandria Ocasio Cortez is pretty similar in background and presence to Pol Pot.