While describing the fairs that used to take place in Goray, Satan in Goray uses the term "children of Ham" to mean the peasants (i.e. non-Jews):
In those days the grain merchants' bins were always full, and fat, white-bellied mice dined there; country whiskey at the taverns was mixed with whole buckets of water. All during the fair the children of Ham rejoiced in their own way. They danced with their women, pounding the floor with their feet, whistling and singing course songs.
Satan in Goray, part 1, chapter 4: "The Old Goray and the New" (translated by Jacob Sloan)
This is obviously a reference to these peasants being descended from Ham, one of the sons of Noach / Noah of flood flame (the Jews being descended from Shem / Sem, hence "Semitic"). Why does Singer choose to use this term, though? Why is he emphasizing the different line of descent from Noach / Noah here? Why is this important?