Problem:
disruptive person onboard.
Solution:
diversion, offloading of said disruptive person.
Costs:
one hour delay on arrival plus handling cost at diversion airport.
Benefits:
safe and smooth remaining flight.
I would say much ado about nothing
Is it really possible to have that kind of tunnel vision and will you feel the same way if the guy loses his job over this?
I suspect the employer doesn't share your point of view.