No, Joshua Oppenheimer is not related to Robert Oppenheimer. Joshua Oppenheimer is a documentary filmmaker known for his work on "The Act of Killing," which examines the Indonesian mass killings of 1965-66. Robert Oppenheimer, on the other hand, was a theoretical physicist best known for his role in the Manhattan Project, which developed the atomic bomb during World War II. Despite sharing the same last name, there is no familial connection between the two.

"The Act of Killing" is a documentary film directed by Joshua Oppenheimer that explores the Indonesian mass killings of 1965-66. It focuses on former death squad leaders who were involved in the murder of suspected communists. The film challenges them to reenact their real-life killings in whatever cinematic style they wish, revealing their psychological state and the impact of their actions on Indonesian society. The documentary is notable for its unique approach to storytelling, combining elements of surrealism and dark humor while confronting the horrors of their past.

"The Act of Killing" is a documentary film directed by Joshua Oppenheimer that explores the Indonesian mass killings of 1965-66. It focuses on former death squad leaders who participated in the genocide and allows them to reenact their experiences in various cinematic styles. The film delves into themes of guilt, memory, and the nature of evil, revealing how these perpetrators justify their actions and how the past continues to haunt them. It offers a chilling insight into the psychology of violence and the impact of political power on individual lives.

In the context of "The Act of Killing," the act of killing one's sister is referred to as "sororicide." This term is derived from the Latin words "soror," meaning sister, and "cida," meaning killer or to kill. The film, directed by Joshua Oppenheimer, explores the mass killings in Indonesia during the 1960s and features former perpetrators reenacting their crimes, highlighting the psychological and moral implications of violence. The concept of sororicide can also reflect broader themes of betrayal and familial conflict.