What he said.
Something else you might ponder, Sol, is that electric discharges create a magnetic field. Fleetingly, but extremely powerfully. I don't see anything in the data to suggest a massive outburst of electrical activity. Just at the time that Tus and his mates were looking for it. In fact, dear boy, what one sees is a massive DROP in the magnetic field at the time of the jet eruption. So we can rule out any electrical woo as the cause of this jet. At least we can if we actually understand science.
As for the diamagnetic cavity; why would there be one? Thornhill, and his equally uneducated sidekick, tell us that the comet is some sort of anode, or is it cathode, to the non-existent electric Sun. So how the hell would a non-magnetised region develop? Surely your idiotic idea calls for the surface of the comet to be receiving some sort of current from (who the ---- knows where). So where is it? Pretty much every damn electric current ever measured, anywhere, anytime, produces a magnetic field. How come the inner reaches of Halley, and, indeed, this comet, are shown to be magnetic field free? Where is your current, and why can't we see it?
I'll save you the bother of answering; there isn't one. Dead in the water. Which is where you started 6? years ago.
Once again, for the sake of the lurkers, you don't have a hypothesis. You don't have a clue.
It's faith based garbage, with no evidence to back it up.