I think this is just jihad on the cheap.
They don’t need bombs, just make everyone afraid to fly.
(A lot more people are willing to act crazy on an airplane than are willing to blow themselves up.)
And these “terrorists” aren’t really punished, and may even be able to sue the airlines.
Once Americans are afraid to fly, our air industry takes a hit.
(Time to start profiling the passenger list.)
“jihad on the cheap” ...this econoclass jihad might expand into other venues of transit if they are following a pattern already done in London. Keep your eyes open and watch carefully fellow commuters on even short trips.