According to the Great Replacement Theory, the nation’s greatness, its traditions and its practitioners, are existentially imperiled by an influx of foreign races, ethnicities or religions. The foreign elements are sometimes described in the narrative of GRT, as vermin or diseases.
GRT was central to the official Nazi motivation for the genocide of the Jews of Europe. Hitler blamed the loss of World War I on Jewish betrayal of Germany. But this betrayal, for Hitler, was intimately connected to the Great Replacement Theory, via the introduction of Black soldiers in the French army subsequently occupying the Rhineland, the so-called “Black Horror on the Rhine.” In Mein Kampf, Hitler writes:
