So, I'll point out here that I don't think anyone on the left is asking to ban books.
I wouldn't support the banning of Mein Kampf, as odious as that "work" is, nor the Bible.
I don't think the toppling of Hitler statues erased him, either.
But the point is how everything happened before and is on track progressing to happen again. We have accumulated more technology, but human beings ourselves are basically the same animals with the same flaws, traits, and demeanor.
Many have wondered why the Jewish people did not leave their homes long before the rail cars came to pick them up, because they had that opportunity.
I'm guessing the Jews thought exactly as you do....