The US has white supremacy in its very bones, we can paper over it but we’ll see it spring up even hundreds of years later. Note that if you do like the US I don’t think that makes you a white supremacist, clearly people are able to compartmentalize them successfully.

Because she wants slaves.

She probably does hate Japan, but I’ll bet Germany gets a pass for some reason 🤔

Because they don’t see the racist, slave-holding south as a past entity separate from their current reality.

If the federal government weren’t stopping them, they’d re-enslave people today. In fact, they have via the prison system. So they don’t want anyone closely examining it, hence banning or slowing the subject in schools if they’re able.