The seeds of dissent were visible almost immediately. Soccer officials had notified the Timbers Army, a fan organization for the team in Portland, Oregon, on the eve of this season that the anti-fascist symbol its members had been waving on a giant banner in the north end of the stadium would no longer be permitted at games. The fan group was not happy, releasing a lengthy critique of Major League Soccer's new rules, and working with team officials for months in meetings to change the rule. But what began as an internal dispute between the league, the Timbers front office,...