I agree with you save one detail: I revere freedom, but I think freedom cannot function without a rational mind and firm ethical grounding. What you see in a mob is chaos. I usually stay away from crowds if I fear they might turn into mobs. A mob is a tsunami and sweeps up most in its path, as you observe.
Hitler, by choice or by accident, played to the mob. He tried to ride it, tame and redirect it and it overwhelmed him. This isn't meant to absolve him of what he did, it stands as a warning of what humanity is capable of descending to .
I know of Dr. Peterson and admire him; I've listened to his talks and I think he's spot on about seemingly good people. I think however that his point is also that because most people are weak to varying degrees, society and culture must remain strong. People need those internal constraints maintained and reinforced around them.
Thanks for your words.