Sobibor extermination camp
The kapos responded in many different ways to the pressures of their job. For example, Oberkapo Moses Sturm was nicknamed "Mad Moisz" for his unpredictable temperament. He would beat prisoners horrifically without provocation and then later apologize hysterically. He talked constantly of escape. Sometimes he just berated the other prisoners for not resisting the Nazis; at other times, he tried to formulate escape plans. Sturm was executed after a lower-ranking kapo named Herbert Naftaniel betrayed him. Naftaniel, nicknamed "Berliner", was promoted to Oberkapo and became a notorious figure in the camp. He viewed himself as German rather than Jewish. He terrorized other prisoners until just before the revolt. Then a group of prisoners beat him to death with the permission of SS-Oberscharfuhrer Karl Frenzel.