I don't know. I think we're doomed to repeat history no matter what we do. I'll bet that what you're saying in this post echoes what some people were saying when the Library of Alexandria was destroyed.
It seems to me there will always be those who want to erase what they don't like and hide their heads in the sand, and those who want to face reality and gain understanding. Technology has advanced but people are pretty much the same.
Doesn't mean you shouldn't speak your mind though. There will always be people who want to destroy, but as long as there are those who speak up, they can't destroy everything, and some of what is destroyed can be recreated or recorded.
I think the Egyptians might have been on to something, building huge monuments from massive blocks of stone. Hard to erase that, and they still may hold undiscovered secrets about our history.
And now, again, we have started storing our history in a massive chain of interconnected blocks. History repeating again?