Things begin to fall into place, don't they. Flaps40, you hit it on the nose, with backup from TerryThomas and Crewrest. It sounds more and more as if the captain sussed out the entire situation en route to the gate, identified the (or one of) ringleaders and whacked him pronto, thus ensuring a peaceful or at least thoughful flight.
There's still time for witnesses to come on to defend the bizclass pax's composure etc but the fact that none so far have done so would indicate the snap decision to leave him behind was right.
No, I'm not agreeing with Maxalt.