To me, religious people, simple racist and libertarians all suffer from a identity-based cognitive bias. "Our groups or my well being is the ideal to project onto the nation/world." (Neocons dont fit in here, i have to admit. Maybe its abuse of power pleasing the monkey brain, but resulting wealth certainly too.)

I think self-withdrawal is more frequent in left leaning individuals for this exact, more unbiased/intelligent/educated reason.

But you are correct again. There is a lot of complexity on the right, if you look deep enough. But this depth does not cause as much infighting compared to the left, because, again: tribalism taking over higher order reasoning.