All of my ancestors immigrated to America in the early 20th Century, including German immigrants not so long before WW2.(So you can probably guess that they’d be discriminated against). Plus, just ‘cause you heard something doesn’t make it true. I’m fine with teaching history, though I’m not fine with teaching critical race theory.
You’re pretty racist because #1. Just ‘cause I have certain political beliefs you immediately assumed I was white. #2. You immediately assumed just because I was white I couldn’t have come from immigrants after slavery. Now it is true that I’m indeed white, but that doesn’t matter. It’s pretty much the same as saying “All criminals are black” it’s true that there’s a higher crime rate among black people, but that doesn’t mean all criminals are black. So that’s no different than saying “All right-wing people are white” it’s true that there’s a higher amount that are white, but that doesn’t make them all white. Probably like 99% of Democrats you think of black conservatives as traitors, or fake black people.
Now to get to the point of my ancestors immigrating after slavery was abolished, you said “when it's how YOU treated people who weren't European”. First off, how did I treat people who weren’t European badly 200 years ago if I haven’t been alive for 20 years. Second, how could my ancestors treat non European people badly in America if they weren’t even in America?
Now my one problem with teaching history is that it’s too easy to bring political bias into, so that’s really the only flaw.