Or we'll elect Donald Trump.
Making mistakes are a part of learning. Trump is terrifying, yes, but if he's elected it will be the people's choice, and not a forced autocracy like much of human history.
We don't always make good decisions, and sometimes the consequences last decades. But considering we even came up with democracy after centuries of putting up with a small group of people having all the power is a lot more inspiring than looking at a single election and deciding all of humanity is fucked.
We tend to think of our current generation's problems as the worst and the horrible things we do and live through as the most important in history, but last I checked, we don't loose millions to plagues, wars, and famines anymore. Leaders can be removed from power through other means than revolutions. We don't go to wars with countries with our traditional enemies because we have the internet to talk to each other and trade and commerce is better for both countries than war.
So yeah, Trump is a blatant fascist who used to sleep with Hitler's speeches in a shelf by his bed (seriously), and the way he talks about Mexicans is almost a point by point comparison to Hitler and the Jews, but if he's elected, it's a sign of something much deeper and darker in the US than a mere candidate. We've outlasted shitty leaders before and carried on, what matters is we learn from it.
People in the US are desperate for better lives and governance. Problem is, they're such a partisan country that thinks of elections as winning a football game instead of deciding what is best for your country. God forbid a Democrat be allowed to have some Republican stances or vice versa.
So maybe the US will find out they're on the verge of electing a man who represents what their grandfathers fought to stop in the 40s the hard way, maybe they won't. I won't hold the entire species accountable for what one country decides to do.