It's wrong to hurt a child for what ever reason.
Benjamin is at a children's party when a child pushes his daughter to the ground.
Benjamin wants to let the kid know not to do that.
Benjamin runs over and tells the child not to do that, and has a talk with the kid's parents.
Benjamin runs over and slaps the kid across the face.
The kid apologizes to Benjamin's daughter and is then punished.
The kid's parents freak out and get into a shouting match with Benjamin.