No, he is certainly not a serial killer. But unfit as a moderator.
The issues here are more subtle but also much too obvious. Posing style and tactics, use of moderator privileges during arguments to create mischief, threats, taunting, unwanted personal messages, servility towards perceived masters, self-aggrandizing profile mottos, and all this while someone is supposed to bring reason and order into the forum. No, I know how to recognize mischievous weasels in real life and will say it if I see one online who wants to play deputy sheriff in my presence.
Other than that, good luck to him/them. I just think he is not allowing himself much room for future self-improvement if he keeps clinging to this sham, while his life-clock is running down.