It's really interesting to me that you seem to assume that non-racism is the default state, and that humans have to be taught to be racist.
Based on what I've seen in the world looking across all the countries I am familiar with, including the US, I have to say I think the opposite is true.
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.