I recommend that everyone takes the time, trouble and expense to visit Auschwitz at some point. It is just outside the lovely city of Krakow, which is a good place to wash away the pain of what you see.
It is horrifying - the whole "Arbeit Macht Frei" on the gates, the piles of luggage, glasses, human hair - take a tour through the camp, see the ovens where the bodies were roasted - and if you look among the tall grass - the flecks of human bone are still there on the ground.
The Germans are in no position to lecture anyone. They should be grateful we didn't destroy them completely. We had every moral right to do so.
Regards, Ivan