It’s been like this for over a decade. The chants and the throwing of things. Ten years ago, the Mexican fans were throwing urine bombs. Hooligans are normal in soccer all over the world. If you ever get so hyped and crazy that you start behaving in a way that you regret later, then it is time to step away.
Anyway, congrats to the USA team. I don’t watch sports much anymore, but will say that in the last World Cup, I did like Mexico’s style. Very aggressive, just push the ball to line, cross and shoot. Almost seemed like transition basketball. Mexicans are never taken to task for their nationalism like Americans are. Still, it’s just young behavior and there should be some reprimands.