Mexican soccer fans (I won’t call it football) in the US not only root for the Mexican team, they boo the US national anthem, throw beer (or worse) on American fans and US players, and otherwise demonstrate their obnoxiousness, poor sportsmanship, and disloyalty to America. I base this description on the examples set in games played in recent years, notably in the LA area.
I remember when Mexico’s fans were chanting the terrorist name, “Osama” during some big game...
Mexicans chanting, “Osama,” Mexico USA WCQ Azteca 3/26/13
www.youtube.com/watch?v=vEnHstbbXu8
The antics weren’t anything new. In a 2005 World Cup qualifier, the Mexican crowd booed the U.S. national anthem and some fans chanted “Osama! Osama!” during the game. Two years ago fans threw containers holding urine and vomit at Landon Donovan.