Re: Food for thought...
Conspiracy theorists will tell you that modern sports has replaced Religion as Karl Marx's "Opiate of the masses". But I think they are full of shit.
Athletics and competition are inherent in our nature, and, since very few of us can achieve the highest levels of competition, we naturally tend to live vicariously through our chosen teams/players.
There is also the factor of us, as fans, publicly "assuming" the persona of our teams. In effect, it is "We", since most sports bars will also have representatives from the opposing team present. It naturally drifts into an "Us versus them" scenario. Again, perfectly healthy and normal.