Not to mention a serious felony -- basically a threat of murder. If that's the way it really was played out, which would have been far in excess of what is needed to scare off Jehovah's Witnesses, who (or so the ex-JW founder of Free Minds tells me) are terrified of anything supernatural. A simple claim to manifest some kind of demonic phenomenon would have sent the JW's packing.
Not that (let me hasten to add) I am advocating any such thing! The demonic is (duh!) evil. It just sounds more like a tall tale to me than anything realistic.