Why do normal people become mass murderers? Why do decent family fathers kill women, children and babies on a daily basis? The perpetrators are members of the Nazi death squads, who killed about 2 million Jewish civilians in Eastern Europe – by bullets, face to face. We hear their thoughts, as they wrote them down in letters and diaries; we hear what they said at court. Why they did not refuse to execute these horrific orders, how killing became a routine, how they managed to excuse themselves, how they were manipulated by their leaders. It’s the blueprint of genocide. “Monsters exist, but they are too few in number to be truly dangerous. More dangerous are the common men. ”