The last few years of my teaching career were difficult on a number of levels. One of the things I had to endure was a bully. You see, unfortunately, I spent more than half my week in a computer lab that was across the hall from the classroom of a bully. Yes, a fellow teacher and professed Christian(ist) is/was a teacher that bullies/bullied her students. From time to time, I would hear the things she said to her class and to individual students who were in the hallway or sitting in the classroom. Disgusting and horrible.
Robert Greenwald has a short film about another and more famous bully. He also has a website here to tell you more ---