Maude Charlee
I agree with what you say 100%, but an aircraft is not a democracy (the company delegates authority to the captain, who delegates it to his/her crew) and surely Tezzer did the right thing in going to the chain of command, otherwise he could have become involved in the fracas and been considered a guilty party?
Had I been him, I would have been prepared to support the CC in restraining the pax, but taking the law into one's own hands is risky under UK jurisdiction.