Jordan Peterson and his views on christianity - is he at least knowledgeable there?

Ever since I once mentioned that I think Jordan Peterson is a grifter, a co-worker has been trying to include him in random conversations to prove me that i'm missing something and I don't understand Peterson. Every time we have a conversation like this it all fails along since my co-worker almost never double checks anything Peterson says and also seem to take at face value everything he has to say.
Long story short, after a few of these events, he finally told me that Peterson is actually an expert when it comes to religion and especially christianity. His theory is that everything good about the western world comes from christianity.
While i'm personally tired of arguing with him about that stuff this actually made me wonder if Peterson, who constantly talks about christianity is actually properly understanding it? Is this another field where Peterson basically invents meanings that are not there only to sell some pseudo profound knowledge to people who are too lazy to check it? Is his understanding of the bible and christianity aligned with the general interpretations in this field? He is notorious for talking a lot about stuff he doesn't know much about and is too lazy to read about. Anybody who knows more about this topic, i'd be happy hear you.