Nah a few fans outside old Trafford being moved along by a former player like Chelski’s fans were would not have gotten the game cancelled for a start.You would of gotten coverage if the match was delayed as per the Chelsea fans protest. That got coverage globally. Did not need to break into the stadium.
Also again, brands worried about boycotts has come after people have actually started threatening to actually boycott all the brands and smashing up reviews online.
The chaos they caused that day made the threat to sponsors real, their now obligated to take it seriously as a result.