I was inspired by revelations brought to light by Edwin Black in his book IBM and the Holocaust, 2001. Black writes:
What seemingly magical scheduling process could have allowed millions of Nazi victims to step onto train platforms in Germany or nineteen other Nazi-occupied countries, travel for two and three days by rail, and then step onto a ramp at Auschwitz or Treblinka- and within an hour be marched into gas chambers. Hour after hour. Day after day. Timetable after timetable. Like clockwork, and always with blitzkrieg efficiency.
The survivor would never know. The liberators who fought would never know. The politicians who made speeches would never know. The prosecutors who prosecuted would never know. The debaters who debated would never know. The question was barely even raised.