This kind of mob behavior has been described as ‘football hooligans’ and is seen among soccer fans around the world (with football term used for soccer around the world). The violence is much more organized and planned in some soccer stadiums—the Eagle fans are nothing compared to the all-out gang wars that happen among gangs ‘supporting’ their soccer team. Soccer mobs murder one another in large numbers.
http://haenfler.sites.grinnell.edu/subcultures-and-scenes/football-hooligans/
A crowd becomes a unified mob when everyone becomes emotionally insynch vs a common ‘enemy.’ It usually takes a single aggressive act to trigger a wave of unified aggression by all those in the mob against the perceived threat. Alcohol lowers the trigger threshold and fuels the emotional response. Beware of (1) groups of males who are still pumping testosterone, (2) those wearing the colors/symbols of the team they are there to support—it can signal they are ready to ‘go-to-war’ to defend the honor/status of their team, (3) a shared level of frustration among the group for their situation in society and the need to see their team victorious—anyone showing up in the opposing team colors is taken as a threat to their side’s victory and a reaffirmation that they deserve their poor social standing.
The serious mob hooligan action in soccer stadiums around the world is seldom seen in US Football. US fans have the $$ to buy NFL tickets and don’t have the same level of frustration and economic despair in soccer fans—way cheaper to attend a soccer match than a NFL game. The longer travel distances between NFL teams keeps fanatic fans apart. NFL fans get their games via TV and don’t have the same need to make the trip across the country to watch their team.
Placing teams in different divisions when the cities are close together keeps the rivalry component low—if the Jets and Giants were in the same division and played each other twice a year (at their shared stadium), there would be a lot more mob hooligan action during their games. They do play one another during preseason and even these meaningless games brings out the combat between the fan base of each team. Big mistake to have the two NY teams share a single home—it belongs to both meaning it belongs to neither alone. There will be some major battles here if the two keep playing preseason games each year.
US fans are usually more individualistic than the group mentality of European soccer fans----you will see small family groups heading to the game in the US while in Britain it will be every person in the city heading over to defend their turf and support their team. Check the response to the notion of engaging in mob behavior on this fan forum—not much support for the mob action whereas in Britain it is a requirement for fans to attend games ready to rumble. Fans from US teams in high population centers have more of the group mentality—one reason Eagle fans are combative—they are defending not just a team but their shared turf/neighborhoods, etc. Phoenix is not a city that has the long generational history with the Cards—our stadium is out in the boonies and not an integral part of any one neighborhood—after the game, everyone is off to their own suburban home or small town up the Interstate.
Established teams with a generational fan base of support will also have the most rabid supporters and are also the ones quickest to go mob rule if they see their team being ‘disrespected’. You see this in the teams that travel and take over the Cards venue—Bears, Packers, Cowboys, Raiders. Many are transplants to Phoenix but they keep that team loyalty with them. . . Cards fans most weekends but true to their ‘real’ team they grew up with as soon as they play here. The generational fans are also the fan base ready to rumble.
Cards are ‘new’ to Phoenix and are still trying to build that generation of fan support—look how many forum participants are old school Card fans from their time in St. Louis—even some going back to Chicago. Also check to see which fans voice their concern that ‘our’ stadium gets invaded with the opposition fans and tickets are sold to their fans. Most are old school Card fans with the newer fans seeing it as a financial decision and not being disloyal to the Cards.
Mobbing behavior is common among social animals who will turn as a group when threatened. We share this behavior with lots of other animals. Flocks of songbirds will go out of their way to mob an owl or hawk to drive it out of the area; prey animals like water buffalo will turn in unison and trample attacking lions, etc; chimps will pick up sticks/rocks and attack a cheetah as a group (Check out Youtube for videos of mobbing behavior.)
The moral of the story: Beware of large groups of drunken people wearing a different color jersey that the one you are wearing. Better still, if you want to go into an opposition territory, go incognito. Or go as a spy and wear the other team’s jersey.