It doesn't matter if LCC offer crap service this appalling behavior reinforces the terrible image Chinese passengers are creating.
They can be arrogant and awful passengers. Taiwanese passengers are even worse - forever claiming compensation and thinking it's their right to behave abysmally. Assaulting staff is not uncommon and 'security' staff are too useless/gutless to intervene.
Westerners are not immune from this (particularly when alcohol is involved) but there is an appalling attitude to what are deemed to be service staff in Asia.
The Captain is to be applauded for his self-restraint.
he would have been fully entitled to defend himself with a solid thumping of the offender but with 100 or more encircling him this would not have been at all wise.
A rotten situation indeed.
Shame on them.