I think Peterson might be on to something with evolutionary archetypal mythology as an undercurrent of human development. I was hoping that was what Harris and him would cover.
It appears to me as part of his study into the evil in human nature that he has become a man that sees malice where it doesn't exist. He truly fears the naturalistic/materialistic worldview, and seems to see demons around every corner. Heavily influenced by Nietzsche, Solzhenitsyn, and Hume.
Hopefully they will have another podcast and get into a discussion that moves beyond the definition of truth.