

To use a different atrocity as an example, the Japanese saw the Chinese as “pigs” during the Nanjing Massacre.
It’s easy to see how dehumanizing your enemy has an effect. Here is an excerpt from The Rape of Nanking by Iris Chang.
there were those in the imperial army who saw the Chinese as subhuman beings whose murder would carry no greater moral weight than squashing a bug or butchering a hog. In fact, both before and during the war members of the Japanese military at all levels frequently compared the Chinese to pigs. For example, a Japanese general told a correspondent: “To be frank, your view of Chinese is totally different from mine. You regard the Chinese as human beings while I regard the Chinese as pigs.”
Oh, like commodity pizza