From sclmlw:

While I don't agree with lots of Jordan Peterson, I think Scott fundamentally missed the boat in some of his criticisms because he systematically views things from a different perspective than Peterson, which was missed.

From what I can tell, Peterson is intensely interested in the idea, "Everyone has the capacity to become a Nazi war criminal. What causes that phenomenon?" His answer, and the central driving idea of his philosophy, seems to be, "Anarchy/chaos is worse for society/humanity than horrific, unimaginable cruelty. So evolution pushed society to develop in a way that will always choose cruelty over chaos. Thus, if you were in Stalin's Russia, you'd run the gulags to stave off anarchy, and you'd kill hundreds of people if you had to. You may hate it, but it was required for humanity to soldier on, so it's what evolutionary forces produced." Peterson cares because he wants to understand how to steer societies away from the gulags and the killing fields.