In Mein Kampf (1923), Hitler posed the following question: “Could anyone believe that Germany alone was not subject to exactly the same laws as all other human organisms?”

What "law" was Hitler thinking about? I hypothesize he was referring to the "law of the immune system," that biological mechanism operating within each organism functioning to reject cells identified as “foreign” or not-self.

Jews were identified by Hitler, Himmler, Goebbels--and other Nazi leaders--as "foreign cells."  The nation, consequently, could act in no other way but to reject or eject Jewish cells.

In a lecture presented on June 20, 1939, Professor Eugen Fischer, Rector of the University of Berlin, asserted that when a people wants to preserve its own nature it must “reject alien elements.” When these elements already have insinuated themselves, the people must “suppress and eliminate them.”

The Jew was identified as such an alien and therefore--when the Jew wanted to insinuate himself--he had to be “warded off.” Such actions were merely self-defense. “I reject Jewry,” Fischer concluded, “with every means in my power.”

Alfred Rosenberg  set forth an immunological concept as the basis of National Socialism. The “spirit of our race," he said, realizes its ability to "assimilate everything racially and spiritually akin," and the iron need to "eliminate and suppress everything foreign.”

The German race would eliminate what was foreign—not because it was false or bad, but because it was “out of tune with our kind and violates the inner construction of our being.”

In his 1935-6 propaganda booklet about the SS, Heinrich Himmler asserted that struggles between Jews and nations had occurred throughout history. The “battle against peoples conducted by Jews,” he declared, belongs to the “natural course of life on our planet.”

One could calmly reach the conviction, therefore, that the struggle of life and death—between nations and Jews—is as much a law of nature as “man’s struggle against some epidemic;” as the struggle of a "healthy body against plague bacillus.”

Just as human beings throughout history always have been attacked by bacteria, Himmler reflected, so nations throughout history always had been attacked by Jews. The “life and death struggle” between nations and Jews could not be avoided. It was a struggle that represented a law of nature, part of the “natural course of life on our planet.”