Mistakes are Reminders!!!!

Dealing With Sins of the Forefathers
Md. Torn Over Statues of Justice in Dred Scott Case

So we've had some shitty leaders in past (and the current) but whitewashing (no pun intended) history is a bad mistake. We need to be reminded of our mistakes so as not to repeat them. This follows along my general principle of never hide the truth, no matter how much it pains us, no matter how much it challenges our way of thinking, no matter how much we wish it wasn't the reality.
This is way I get vexed to any form of hiding the truth or restrictions on speech. A great example of this is protecting racist speech, is it a disgusting stupid mark on humanity, but it shouldn't be suppressed for the very fact that the best response is by exposing everyone to how fucking ignorant is it.

Update:
In that same vane I saw this comic:
Kansas Classrooms