Anyone with experience teaching children could tell you that racism is taught. It's just not baked in for kids.

However it's also not a very interesting question imo. You will never "reset" a generation from any aspect of culture, and now that we're in the global information age it's triply impossible. We don't need to fool around with naturalist fallacy - it's enough to say that racism is bad and we should get rid of it.

I have experience teaching children. They typically don't experience the scarcity that leads to fear and tribalism among adults. Tribalism doesn't have to be taught.