[God luvs America]

I would deal with this by saying, “I identify as religious royalty so please address me as “Your Holiness” during the rest of our conversation.....

[glennaro]

I would gently say:
"I will not participate in or sanction the delusions of your mentally ill employee ... and I think you are being cruel by pandering to your employee's illness instead of helping him obtain the mental health therapy he so clearly and so desperately needs, and to help him break free of the powerful mind- and body-altering drugs Best Buy is likely helping him obtain. You're a cruel person, Mr. [whoever]."