no, actually, kids don’t need to be “taught not to discriminate”
If you never teach a kid that black people are lesser, a kid will never come up with the idea that black people are lesser.
You have to raise them in a society with people who aren’t like them, though. Because otherwise you end up with people like you, too ignorant to realize a few simple truths:
We’re all humans, and we’re all in it together. There is no “other” because we are all one society.