Their enmity predates the Major League Soccer competition where they both play .
Fans of both sides can get vitriolic in their disdain for another as Sports Illustrated 's Grant Wahl reports in this great piece .
Their enmity predates the Major League Soccer competition where they both play , and fans of both sides can get vitriolic in their disdain for another as Sports Illustrated 's Grant Wahl reports in this great piece .