I'm afraid you're beating an "invisible" horse here. Apparently you and I have seen a lot of documentaries about what was actually going on in the concentration death camps.
Such arrogance! You don't believe that I, whose father is Jewish, whose grandmother and grandfather suffered under pogroms, have not thought seriously about the Holocaust, racism in Europe, and the psychology of the people who suffered under them? You don't believe that I, who has an advanced degree from Brandeis, one of the most "Jewish" universities in the world, would not have been exposed to analyses and discussions of Nazism and the Holocaust--more than a few documentaries--and know how humor might be used by the descendants who suffered under them?