I still can't believe we have hundreds of years of documented history to learn from, yet human intelligence is still blinded by bigotry.
[1] Which is not always bad. This is core mechanics of our competitive adaptiveness probably. It's just that being more aware of this gives us a chance to be better in more universal terms with other humans. Including in politics, of course.
P.S. If you felt offended, sorry! I can't say I care too much ngl, it's the internet after all, but it wasn't my intention either. I also didn't downvote you.
So what exactly is the different lesson you're referring to? Given that bigotry still exists, I can only take that lesson to mean "bigotry good."