It's wrong to judge people for things they can't control.
Dan is in a classroom with Bill who has tourettes which results in involuntary verbal tics.
Dan wants to react to Bill's verbal tics.
Dan reads aboit tourettes and asks Bill questions about what it is like to have it.
Dan mocks Bill for the tics and shames him for it in front of others in order to impress them.
Dan understand Bill's condition, and they soon become friends.
The class sees Dan as a bully and does not associate with him.