Moishe was able to return to Sighet because he survived what was supposed to be the killing of all the foreign Jews who had been transported out of Hungary. The train in which they were all taken away came under the control of the Gestapo as soon as it entered occupied Poland. When it stopped, the Jews were loaded onto trucks which transported them into the forest where they were forced to dig the trenches that would be their mass graves before being shot. Moishe had escaped "By a miracle. He was wounded in the leg and left for dead..."
Moishe returned to Sighet because he wanted to tell the Jews still living there of what had happened to him, to warn them of what was going to happen to them.