The Nazis are a group well known for containing large numbers of perpetrators of a genocidal level of violence. Unlike most veterans, the Nazis did this usually with minimal danger to themselves. The graphic scenes they witnessed were ones they caused, with the confounding variable of concurrent dangers as possible etiological traumas being much less in this than in other groups. However, the confounding variable of previous traumatization remains, which was amply provided by World War I. Additionally, German interwar psychiatrists treated PTSD harshly, believing its root cause was a desire for compensation or coddling.
Unlike most historical instances of genocide, the Nazis left a large number of documents behind which can be utilized in the search. The information on psychological consequences of mass murder to those who carried it out is available through diaries, court transcripts, memoranda, and interviews, which have been well researched, analyzed, and consolidated in numerous secondary sources. Were posttrauma symptoms among Nazi perpetrators sufficiently intense or widespread enough to allow us to find evidence of them?
As with the historical executioners, a diagnosis cannot be given to historical figures because no interaction is possible; they cannot respond to clarifying questions. We must be satisfied to glean whatever information is suggested from what they did choose to leave behind. Additionally, many of the secondary sources that discuss the historical documents were done by authors with varying perspectives; none of them has had the documentation of PITS as an interest.