People can be obsessed with sports which would lead them to engage in violence. There have been occasions where supporters of clubs engage in violent fights which have led to death and destruction of properties. Many people were arrested in Paris after PSG's victory over Arsenal for several offences which include violent or wide celebrations. This shows that football and other sports could trigger violence. People should gamble with the mindset that they might also lose.
The violence news which I read about on your reference match, most of them don't have to do with gambling; it's pure aggressive fans who took offence from the loss and how the winning team was celebrating and mocking them, and that triggered a fight. That is also very common among fans, and it gets worse each time money is also at risk and staked, especially with those who are very violent in nature.