Ok, I am anti-manipulation, so I hope this doesn't come across that way.
You have been speaking your truth to him. This has zero effect because you are not saying what he wants to hear (you already know this).
You know him, what would get him out? Could you say, I hear you and I hear your pain. What if you leave and go and stay with whomever for a month while we both clear our heads and reset from all this anger (parents nearby? Friend? Church Friend, heck the pastor!). I'm sure his church friends will rally round him (you may want to point that out to him) "they are his rock". They think so highly of him and can be his quiet place to land for the time being.
You know what I mean, is it worth a try? Be on his side, save him from you : )