There were many horrors of WW2. Those issues are well covered elsewhere, so not addressed on this blog. Instead, I want to highlight courage and dignity on both sides.
In Real Great Escape - Conditions, Rob Davis writes:
Allied aircrew shot down during World War II were incarcerated after interrogation in Air Force Prisoner of War camps run by the Luftwaffe, called Stalag Luft, short for Stammlager Luft or Permanent Camps for Airmen. Stalag Luft III was situated in Sagan, 100 miles south-east of Berlin, now called Zagan, in Upper Silesia, Poland.
It must be made clear that the German Luftwaffe, who were responsible for Air Force prisoners of war, maintained a degree of professional respect for fellow flyers, and the general attitude of the camp security officers and guards should not be confused with the SS or Gestapo. The Luftwaffe treated the PoWs well, despite an erratic and inconsistent supply of food.
the Luftwaffe was (the least Nazified of the three German forces)
I haven't read much about the other Stalag Luft camps, but this note is interesting:
Compared to other prisoner of war camps throughout the Axis world, it was a model of civilized internment.