Weird news - Fight between 2 Chinese on board Swiss flight forces it to turn back

When people book a ticket on a flight, their need can be very critical. They could be going to meet a sick relative on the deathbed, could be going for an important business meeting, or the flight could be part of a vacation. In such cases, the delay or cancellation of such a flight can be very tricky, and cold cause huge effort for the people involved. Such delays and cancellations also have impacts on airlines; it means impact on their customers, it means heavy new logistics including maybe having to arrange for food and lodging for the flying customers, means having to pay charges at the airport (could be the one from where the flight was delayed, or a different airport in case their flight was diverted), and extra fuel that any change in their flight plan can cause. And for these extra costs, they cannot get more from the passengers, and in fact, they face some loss of goodwill for any such thing.
On a flight, any nuisance is treated very severely (the captain of the flight has responsibility and authority over whoever is on the flight) and in many cases, disturbances creators can face trial and jail terms depending on what they had done. Given the problems that can happen, it seems strange that a flight had to get diverted because of some quarreling passengers. The quarrel must have been very intense and the crew would not have been able to get the passengers pacified; as a result, the Swiss International flight bound to Beijing had to return to Zurich. The passengers were then taken off and arrested by the police at Zurich after disembarking (link to article):

A mid-air brawl between two Chinese passengers onboard a Swiss International airplane disrupted the Beijing-bound flight and forced it to return to Zurich, where the duo were arrested. According to media reports, a 57-year-old Chinese man travelling on the flight last Sunday felt disturbed while eating his meal when the passenger in front of him , another Chinese citizen, aged 27 reclined his seat. The elderly person who was reportedly drunk, hit the younger passenger when he did not respond to his protests. A fight then broke out between the two, which caused one of the passengers to bleed, state-run China Daily reported.