The guy's a psycho and deserves to get locked up. I've seen far more "Passenger - F/A" altercations, started by the F/A.
Comments like this:
The passengers don't pay our wages, I'm getting sick of hearing that. The COMPANY pays our wages, and it's the responsibility of the directors of that company to have a clear strategy to make those passengers want to fly with us, as well as our responsibility to keep them happy. My company is obliged to pay my wages every month, regardless of how many passengers "who pay our wages" have we managed to take.
Passengers, are Customers of your Airline, not the inconvenience that plenty of F/A's think they are.