Kenneth Anger, an experimental filmmaker who found a loyal cult following with his works that elucidated the dark side of pop culture, has died at 96. His gallery, Sprüth Magers, announced his death on Wednesday. Anger’s influence is vast, with filmmakers and artists of multiple generations having drawn on his lurid depictions of violence, fascism, and homoeroticism. In Anger’s films, Nazis proliferate, and the threat of carnage—of physical, mental, and sexual varieties—is ever-present. Pop music proliferates, and references to quasi-religious sects and celebrity worship are pervasive. “Anger’s films exploit Hollywood’s elaborate costumes, fantasies (both violent and erotic), otherworldly sets, and...