This is how Gygax creates a culture: consider his invention of the Drow.
Gygax borrows the concept of Light Elf versus Dark Elf from reallife Norse folkbelief. He misunderstands it as if referring to American skin-color racism. The Norse terms refer to hair color, but apply to literal luminosity verses dwelling in darkness, and moreso to the mindful intentions. Then as a twist, he throws in Greek Arachnea. Then he calls this amalgam reallife sources by the Scottish word "drow" (which actually derives from the Norse term trǫll).
Gygax creates all of the human cultures in the same way, a reallife reference with a twist. For example, the "North" "Barbarians" are plainly a Norse culture, especially Norwegian. In reallife, I have more than one relative named "Ingrid". It is almost entirely negative stereotypes made deeply worse by fusing it with Nazi German racism and cultural appropriation and misrepresentation.
In any case, the point is, even when creating a fictional culture, sensitivity.