This is really the whole ball game for me. It's genuinely amazing that people can't see we're teaching children a racist, bigoted ideology at an age where they lack the critical thinking skills to see through it.
It's like we've lost sight of the fact that, like your son, children don't think about race in the way some adults have learned to. We should be doing everything we can to preserve that mindset, not systematically teaching them to be more race conscious than ever.