Andy stood up for the others in the beginning of the movie. John was picking on Claire and he stopped him. He stood up for others in the beginning of the movie. Towards the middle of the movie he just does nothing about the people being picked on. It’s almost like Andy and John were friends for part of the movie.
Andy was a bully to some of the nerds because he told the story of putting tape on the kid. The kid’s name was Larry.