While much of what happened during acts of mass killing did reflect thinking of the Jews as less than human, some of the actions prior to this—the various humiliations and degradations of Jews in the Ukraine, for instance, and the delight that people took in this—reflect an appreciation of the humanity of those who were being tormented. If you don’t think of them as initially possessing dignity, where’s the pleasure in degrading them?
Again, this seems very strange. People can obtain pleasure from torturing animals, and directions if indignity can again be about reinforcing the idea that your victims are not human.

