It would seem to me that "the conditions of war" are immaterial to this discussion since the prisoners in the various death camps were never given the chance to be at war. Men, women and children were not only shot, gassed or otherwise murdered, they were used for horrible experiments (twin children were especially of interest to the infamous Dr. Josef Mengele (among others). Here's a brief outtake from one survivor's testimony:
"One day, my twin brother, Tibi, was taken away for some special experiments. Dr. Mengele had always been more interested in Tibi. I am not sure why - perhaps because he was the older twin.
Mengele made several operations on Tibi. One surgery on his spine left my brother paralyzed. He could not walk anymore. Then they took out his sexual organs. After the fourth operation, I did not see Tibi anymore.
I cannot tell you how I felt. It is impossible to put into words how I felt. They had taken away my father, my mother, my two older brothers - and now, my twin. (The surgery was done without anathesia).
So, just as the Jewish Nazi hunters like Simon Wiesenthal and Mossad never ceased efforts in locating the criminals, civilized mankind must never relent... Here in the U.S. as well as other locations it's only one small step from complacency to Holocaust denial...
I also think vengence should be a part of the process as long as the letter of the law is observed...