[nomadpenguin]

An important piece of context is that many of the New Left thinkers you mentioned are responding directly to the horrors of WWII and the Holocaust. While yes, tribalism, brutality, and oppression are all present in non-Western cultures, I don't think it's an absurd claim that it is only Western rationality that can produce mass suffering at the scale of the Holocaust.

[cmrdporcupine]

The Khmer Rouge in the 70s, and the Japanese in the early 20th century would like a word with you.