How did Justin terrorize Julian and his friends from wonder?

In the novel "Wonder" by R.J. Palacio, Justin terrorizes Julian and his friends by bullying Auggie Pullman, the protagonist, who has a facial difference. He spreads rumors and encourages others to ostracize Auggie, making him the target of ridicule at school. Justin's behavior embodies the cruelty of peer pressure, as he seeks acceptance from his friends by aligning with their mean-spirited actions. Ultimately, this bullying highlights the themes of kindness and empathy that are central to the story.