It's wrong to enable your friend to be a bully.
Jim sees his friend pick on and abuse a smaller boy.
Jim wants to react to his friend's behavior.
Jim tells his friend that he is a coward for picking on the smaller child.
Jim laughs at the smaller child and tells his friend to keep picking on them.
The smaller child feels good that somebody stuck up for them.
The smaller child is left with painful memories of being bullied.