First, the cost of crime is low, and the general punishment for fighting is very light. If no one is injured, the hitter will not go to jail, but will be detained for a few days at most, and then the police will let him go after a few words of oral education. Of course, if someone gets hurt, that's another matter. Hitters need to compensate for various medical expenses, and the punishment will be relatively heavier, but they will not bear criminal responsibility. However, if a person is killed or seriously injured, he may be sentenced here, ranging from three years to ten years. If the circumstances are extremely bad and the means are extremely cruel, it is also possible to sentence others to death. But in a word, the state's punishment for general fights is still too light, because the illegal cost is low, so people will not be too restrained and will not consider the consequences when they start.
Second, there are various inducing factors. These beatings in the news have obvious inducing factors. There is no enmity between the two sides, but they both drank wine at dinner, and they were in high spirits and unclear minds. It was easy to quarrel with others, and the restless people next to them finally got into a fight. So getting drunk is the core reason why everyone starts to work. Under normal circumstances, there is no need for everyone to start work for such a trivial matter.
Third, the lack of insurance measures. Imagine that if you fight with others at home, there will always be someone around to stop the fight, and such disputes will always be resolved in time. It's different outside. No one wants to get into trouble, and no one wants to get involved with a group of drunks, so the probability of these fights will become higher. Many people fight with others at dinner, because they are drunk and confused, and no one stands up to stop the fight, which eventually turns into a big conflict.