If he doesn't want to explain any more, I'll probably just delete his account. His posts kinda' wreak of the Hebrew roots cult-style of belief, but I was willing to overlook it to try and be patient. However, when he marks down his belief as "other," and isn't even willing to explain himself (not just to me, but to everyone else's reasonable inquiries), I don't think our forum's the right place for him.
Again, we are not social media. We are born again Christians who are open with one another. If someone joins who has a different belief and wants to discuss things, that's okay, so long as they explain themselves.