Re:Interview with an Auschwitz Guard: 'I Do Not Feel Like a ...
by Houshalter on Sunday September 07, 2014 @02:11AM
(#8280459)
Well fragging was common on the front lines because it had plausible deniability of the enemy throwing a grenade back. In a prison camp far away from the front, it's more difficult to explain, and harder to get away with.
http://en.wikipedia.org/wiki/Fragging
I suppose the soldiers asked to do bad things (like this man) rationalize it away.