‘Who knows’ is the operative phrase in this sentence, from the other thread, as posters conjectured was he this, was he that?
You know who knows? A professional in such things. Yes, it can be hard to distinguish Charlie Sheen from other actual mental illnesses. But a Dr could do it, I’m pretty sure.
I think you should care about your friend enough to get him to a professional. If the Dr says, “Nothing but religious zealotry, take him home!”, you’ll know. But trying to diagnose what could be a very serious, yet often simply treated, mental illness, as a lay person, is very foolish indeed.