At the end of World War Two, the United States Army liberated the Concentration camp of Buchenwald, and began the painstaking process of administering to the survivors. Rabbi Herschel Schechter, who was the chaplain of the US eighth army, stayed in the camp and attempted, as much as was possible, to create a semblance of Jewish experience for those who had survived. How does one run a prayer service, and encourage people to pray to a G-d who seemed to have been so absent in those terrible years?
Rabbi Schechter requisitioned one of the barracks and set it up as a makeshift synagogue, and began running services for those who were interested. One day, noticing one of the survivors standing on the side watching the prayers, Rabbi Schechter invited him to join the service, but the man refused. Nonetheless, he remained in the barracks, watching the service with the vacant eyes that were common in the camps in those days.
Realizing he had seen this fellow attend services before, though always as a spectator, Rabbi Schechter approached him again, and offered him a siddur (prayer book). The survivor, whom we now know as Simon Weisenthal, refused again, and explained: