I think this is spot on.My suggestion to all is to stop responding to him. Don't take him seriously. He has shown he has no intention of actually engaging in a sincere discussion.
If he truly researched the topic and wanted to understand the pros/cons and benefits/risks he'd be able cite literature that countered his argument himself. He seems to only be able to cherry pick his data.
Once he's conducted a systematic review on his chosen questions, then we can talk.
Maybe a temp ban until he can confirm he has a study protocol at the very least? Even better, results.
