One group of people is saying: "This hurts, please stop", to which the other group says: "No".
So the first goes back to the drawing board to come up with reasons, theories, explanations, convincing arguments... and you get things like critical race theory, systemic *isms, etc.
That's pretty much it. Sure, there's other bits in there - about accomplishing the "stop", or about handling emotions around blame, or about handling your own hurt, etc - but, at the end of the day?
It's really just people saying "this hurts, please stop", and what forms around the response when the response is "No".