The left always acts surprised when someone suggests that history might repeat itself. Never mind that it has countless times already. Face it, until human nature changes, history will forever repeat itself. Even though we learn things, over a time people forget things and falsely believe that, in this day and age, certain things cannot happen again. It's a foolish way to think. Only difference these days is that wannabe dictators have more technology at their disposal. While we have easier access to media, it has become less dependable. And we have more and more ignorant people who just don't pay attention, which is something that never changes. There has always been a portion of the population that is easy to fool and easy to use.
Until narcissistic people vanish from the earth, they will continue to believe that they are best suited to control the populace and dictate to all the lesser beings. They and their ilk will continue to seek power by any means and never have a pang of guilt for the suffering they cause others.
A situation like we saw with Hitler could happen again. There are those who would try to make it happen. Considering the sorry state of the union, nothing should surprise any of us anymore.
And while some roll their eyes at the notion that people could be so stupid again, they are tolerant of those who want to erase that part of history and pretend it never happened in the first place. The only logical reason for that is pave the way for it to happen again. If history is erased, no one can learn from it, can they?