On the 3 planes you reference, the passengers were persuaded that the plane was being hijacked and taken to a foreign country. These passengers had a reason to cling to this outcome because the jihadi plotters made sure of it. On the 4th plane, because it’s take-off was delayed and word of what happened on the other planes got through to the passengers, it was understood by the passengers they had no choice but to take action and attempt to re-take the plane.
I doubt many Amercans are yet so desperate as to take direct action as on Flight 93. The leftists who are taking America piece by piece have been clever enough to date to use an incremental approach and thus like the jihadis on the first 3 planes they have allowed people to believe the outcome will be OK.
Of course, it won’t be.
That is a terrific real-world analogy. Frog, meet warm water. Nice! Like a hot tub!