I partially agree. I think all humans are psychologically predisposed to in-group and out-group thinking. Skin colour is a very simple determiner of such a thing if we allow it to become so - the skin colour itself is irrelevant. Without such an obvious example, we would simply choose some other arbitrary characteristic to base our thinking on.

We do have to challenge racism at a systemic level, but the methodology with which we attempt this cannot circumvent the need for individuals to understand their own psychological processes. Ironically we need to move to a position where 'racism' with a small 'r' is understood to be a little hiccup in the natural way we're wired and can be overcome, but Racism with a big 'R' must be mitigated again. That's a tough job for society to do and identity politics (which pulls focus away from individual psychological development in favour of group development) cannot and will not ever reduce 'r' in humans and without that you are only increasing R in the long run.

You can't resolve R by pretending it doesn't exist - but nor can you solve it by inferring that it is the root of every single issue that every person ever has with everything. It's nuance. Children need to be taught nuance.