Aryan Brotherhood (American History X)

The Skinheads are one of the main antagonists of American History X and are based on real-life prison gangs, at first they sought to befriend the protagonist after they saw he had Aryan tattoos but became disgusted with him after he befriended an African-American prisoner: as vengeance one of their leaders brutally rapes the protagonist (a scene that continues to cause some controversy due to male-on-male rape).