Jason Stanley: How Fascism Works:
Whereas cities, to the fascist imagination, are the source of corrupting culture, often produced by Jews and immigrants, the countryside is pure. The “Official Party Statement on Its Attitude toward the Farmers and Agriculture” was published in the National Socialist Völkischer Beobachter in 1930, with Hitler’s signature (though its actual authorship is unclear). It contains a concise statement of the Nazi ideology that the true values of the nation were to be found in the rural population, that National Socialists “see in the farmers the main bearers of a healthy folkish heredity, the fountain of youth of the people, and the backbone of military power.” In fascist politics, the family-farm is the cornerstone of the nation’s values, and family farm communities provide the backbone of its military.
Resources that flow to cities must be directed to the rural communities instead, to preserve this vital center of the nation’s values. And the rural communities, as the source of the pure blood of the nation, cannot be polluted by outside blood via immigration. It was official Nazi policy that “by bettering the lot of the domestic agricultural laborer and by preventing flight from the land, the importation of foreign agricultural labor becomes unnecessary and will therefore be forbidden.”