Very astute; and thanks for your extensive response.
Add to your final comments re: the spirit world and age-old visits to principalities and powers by shamanistic practitioners — some of the frightening observations by an off-rails anthropologist, Carlos Castaneda, among the Yaquis in Mexico, and Johanna Michaelson, who was brought out of occultic practices by Francis Schaefer himself.
Some of the observations and methodologies of Peterson remind me, remotely, of those of Paul Tillich — except that Tillich, for all his existentialist psychobabble, actually acknowledged the realm that is outside this mortal coil.
"Paulus lived in fear. His nervous body was tense; his desires -- many. His fingers would fiddle with a pebble from the beach, a silver coin, or a paper clip. He breathed unevenly and sighed heavily, an ever guilt-ridden Christian in distress. His was the Temptation of Saint Antony in Grunewald's altar, attacked by demons. His solution was to suffer the demons, take them into his being and describe them in words. He was the martyr of the mind." (The Paganization of Biblical Studies, Dr. Peter Jones)