(1) I did back them up. I'm apologizing for the mess of non-seminal citations (which do document the point), and not being completely comprehensive, not saying I didn't or won't do it.
(2) Peterson's core message about how to conduct oneself is what you call the "superficial stuff". Sometimes people get the basics wrong and need to hear basic advice.
(3) Peterson has been good at making money off it, and I think there's ample evidence he's drifting increasingly far from what he knows well.
(4) Can you provide a source where he claims that unearned supremacy is the birthright of white men? He was certainly extremely far away from that originally. Has he actually shifted that much?