Some of the Germans followed the Geneva Convention. Some of them didn't.
NONE of today's enemies follow the Geneva Convention. They execute prisoners. So why should we take any prisoners?
Well, as a German I have to say, that not only the Germans didn´t always follow the Geneva Convention.
All others did as well.
And I don´t say this because I want to deny any guilt from Germany, not at all, I just want to spread the dirt a bit more evenly.