Something doesn't quite add up. Usually any disruptive behaviour on a flight would result in either aircraft continuing to final destination or diversion if it was really bad but would request for police to meet the aircraft on arrival at the gate.
There must be something particular in this disruptive passengers behaviour or any specific threats that would result in the Typhoon's being scrambled.
There is something not quite adding up here. I am guessing the reason in the delay of the aircraft leaving was due to full search of the aircraft to make sure there was nothing untoward on board.