The Tormentors (1971)

Plot

A ruthless biker gang, obsessed with Nazi ideology, terrorizes all who cross their path, indulging in illegal arms dealing and ruthless violence. Their reign of chaos appears unbreakable until they cross paths with a determined individual. After his girlfriend is brutally killed, he vows revenge and sets out on a personal crusade against the gang. However, to dismantle their empire, he must infiltrate their ranks and adopt their savage ways. The lines between vengeance and survival blur as he fights against the very darkness he seeks to eradicate.