Of course I'm not in a position to diagnose anyone with anything specifically, however I think erratic self-destructive behavior is in that realm.

"A mental disorder or psychiatric disorder is a psychological pattern or anomaly, potentially reflected in behavior, that is generally associated with distress or disability, and which is not considered part of normal development in a person's culture. "

http://en.wikipedia.org/wiki/Mental_disorder

Regardless, my assessment of his mental health is irrelevant to my argument that he has no credibility for other substantial reasons.