Football supporters fleeing rubber bullets, roads into stadiums blocked by angry crowds, mobs throwing stones at Fifa offices, Confederations Cup placards being ripped down and burned in the midst of mass protests. These are unlikely scenes in a football-mad country and the last thing organisers of the World Cup wanted to see in Brazil before next year’s tournament, but for the past week they have become an almost daily occurrence as the country’s favourite sport has become the focus of the biggest demonstrations in decades. In a speech broadcast nationally on Friday night the Brazilian president, Dilma Rousseff, said she accepted the need for change but warned that violence would not be tolerated and appealed to protesters not to endanger the World Cup. More than a million people took to the streets on Thursday night in at least 80 cities in a rising wave of protest that has coincided with the Confederations Cup. This Fifa event was supposed to be a dry run for players and organisers before next year’s finals, but it is police and protesters who are getting the most practice. The host cities have been the focus of furious demonstrations, prompting local authorities to request security reinforcements…