I wanted to know more after I read your post. This is what I found:
Sometime in January 1945 the Germans announced that all Jewish POWs in Stalag IXA were to report the following morning. Master Sergeant Edmonds, who was in charge of the prisoners, ordered all POWs—Jews and non-Jews alike—to stand together. When the German officer in charge saw that all the camp’s inmates were standing in front of their barracks, he turned to Edmonds and said, “They cannot all be Jews.” To this Edmonds replied, “We are all Jews.” The German took out his pistol and threatened Edmonds, but the Master Sergeant did not waver and retorted, “According the Geneva Convention, we have to give only our name, rank, and serial number. If you shoot me, you will have to shoot all of us, and after the war you will be tried for war crimes.” The German gave up, turned around, and left the scene.