>> I thought we had pretty well cleansed mental health of demonology. Evidently not. <<
Let me be careful to say that chemical imbalances are real, and are not demonic. The thoughts which sufferers of such imbalances bear are not rational thoughts, nor are they good thoughts. Suffering from demonic influences does not make one evil, and they are not caused by sin, nor do they cause sin.
What you are saying when you say that is merely that mental health is typically described through an alternate paradigm than through demonology.
So, from what I understand through your last comment, Hitler didn't sin, because he was tempted and commanded by demons to kill the Jews, Germans and the Roma? Or did I miss something?