The pilot is responsible for the safety of everyone on board. The question is, was the behavior of the passengers a credible threat? My guess is that the TSA

The pilot is responsible for the safety of everyone on board. The question is, was the behavior of the passengers a credible threat? My guess is that the TSA & the airline (the pilots employer) have told him to put anyone off if there is even a hint of noncompliance. One of my favorite "hidden" quotes from the movie Brazil may be applicable: "Suspicion Breeds Confidence"