The book advocated genocide through the sterilization of all Germans and the territorial dismemberment of Germany, believing that this would achieve world peace.

[2][3] Kaufman advocated the mass extermination of the German people through forced sterilization and the territorial dismemberment of Germany after an Allied victory in World War II.

"[5] Kaufman defended his plan for the "sterilization of all Germans" in an interview published in the September 26, 1941, issue of The Canadian Jewish Chronicle:[6] I believe that the Jews have a mission in life.

[12] In his 1944 book What To Do With Germany, Nizer accepted the collective punishment of Germans and considered, though ultimately rejected, their mass "eugenic sterilization".

[12] In 1945, a Jewish journalist wrote an article claiming that the book was "little more than self-indulgence in dire vituperation by a man who sees Germany as the sole cause of the world's woes".

[7] The book was denounced in Germany as an "orgy of Jewish hatred", and it was seen as inspired by United States President Franklin D. Roosevelt's supposed polemical anti-German agitation.

He quoted Kaufman at length and then commented: "By destroying the German people, the Jew wants to stop up the spring from which, since the beginning, the world has always found its creative blood, the source of all that is beautiful, good and noble.

"[16] Joseph Goebbels also gave a radio address from Berlin warning Germans of "plans 'for sterilization of our entire population under 60 years' of age".

[4] These concerns were echoed by Adolf Hitler himself after the US entered World War II; he claimed mass sterilization of German male youth was a "primary" American goal.

He belongs to the so-called Roosevelt Brain Trust, which provides intellectual and political education and advice to the American President.

"At his Nuremberg trial, Julius Streicher cited Kaufman's book in his defense, claiming his anger at Jews was prompted by Germany Must Perish!.

supports his contention that World War II was a genuine response to German fears of a worldwide Jewish plot.