Good analysis. I'm not paraphrasing, but my points aren't all that different from Taleb's. Here's what I said to a friend in message:

Sam Harris’s book is called Waking Up: A Guide to Spirituality Without Religion. I would define religion differently: Religion = {dharma, belief, culture}. What Sam is doing is religion as dharma with minimal belief and culture, where dharma is pragmatic behaviors and moral heuristics governed by the laws of reality. I understood Peterson as giving a dharmic approach to Christianity, while Sam tries to attack the belief aspects of religion while separating the dharmic practice of meditation as something different.