I think there's little if anything we can know about the historical Jesus. Due to the paucity of evidence, we can weigh the plausibility of different scenarios, and as Schweitzer showed, the latter tend to reflect our preferences.

It's possible Jesus never thought of himself as divine, and he was deified after his death to bridge Judaism with Hellenistic Rome. It's also possible Jesus was a Jewish mystic, as indicated by the Gospel of Thomas and by Mark's talk of esoteric and exoteric teachings. So he might have identified himself with God not in the literal, gross Roman sense, but in a more Eastern one, aligned with Hinduism. The mystery religions were promoting that kind of mysticism for centuries in the Mediterranean.

Luke portrays himself as the most careful of the apologists, but his works are filled with Catholicizing propaganda.

I'm not sure how much we should defer to Western mental health experts since they seem to have sold out to the drug industry.