After suffering serious wounds, Fleischhauer retired from military service and received a government pension, although he continued to serve for some time as chairman of the National Federation of German Officers (Nationalverbandes Deutscher Offiziere).
Intellectually, Fleischhauer was a disciple of Theodor Fritsch and through their common Völkisch movement circles he also developed friendships with a number of other revolutionary nationalists in secretive Aryan organizations such as the Thule Society.
For a nominal fee, subscribers to Welt-Dienst's twice monthly series of mimeographed information sheets received summaries of news stories and other developments worldwide which tended to discredit anyone and anything linked to Judaism and Jewish Bolshevism.
[citation needed] In 1934, Dr. Alfred Zander, a Swiss Nazi, further inflamed public opinion by publishing a series of articles accepting The Protocols' description of a Jewish plot to take over the world as fact.
Outraged, a group of leading Swiss Jews filed a lawsuit in the Amtsgericht (district court) of Bern on 29 October 1934 to censor The Protocols as "indecent writings" under a Bernese statute prohibiting the distribution of "immoral, obscene or brutalizing" texts.
Vladimir Burtsev, a Russian émigré, anti-Bolshevik and anti-Fascist who exposed numerous Okhrana agent provocateurs in the early 1900s, served as a witness for the plaintiffs at the Berne Trial.
However, Fleischhauer helped coordinate efforts by other defense experts and himself provided media with extensive commentary and written material in support of the defendants (Theodore Fischer and Silvio Schnell), with Bodung-Verlag issuing a comprehensive German-language version of his The real Protocols of the Learned Elders of Zion.
By the mid-1930s, the Welt-Dienst emerged as the largest antisemitic operation in the world, publishing works in many foreign languages, and the nearest fascist equivalent to the rival communist Third International (Comintern).
'"[8] Over time, a veritable international "who's who" of antisemitic collaborators and correspondents contributed to Welt-Dienst publications and in turn quoted from them, including Henry Coston (France), Louis Darquier (France), Arnold Leese (founder of the Imperial Fascist League in Britain), Ludwig Heiden ("Luis el-Hadj" – an SS official and journalist who converted to Islam and translated Hitler's Mein Kampf into the Arabic language), Ion Moţa (or Motza, one of the leaders of the ultranationalist Iron Guard from Romania who fought on the fascist side as a volunteer in the Spanish Civil War), Juan Sampelayo (secretary of the Falange Party's Jefatura Nacional de Prensa y Propaganda [Department of Exchange of the National Leadership of Press and Propaganda] in Spain), as well as Boris Tödtli (Russia and Switzerland).
William Dudley Pelley frequently printed World-Service articles in his Silver Legion of America magazine, Liberation, advocating a "purge of Jews and Communists in Hollywood".
During the 1930s, Fleischhauer further expanded his propaganda efforts by organizing the Pan-Aryan Anti-Jewish Union and a series of international antisemitic congresses to actively push for the suppression of Freemasonry, combat the alleged "Jewish conspiracy for world domination," and encourage the geopolitical depopulation of Jews from within Europe through mandatory resettlement in southern Africa as was envisioned by the Nazi-promoted Madagascar Plan.
After a shakeup in lines of authority, by 1938 the responsibility for international antisemitism was shifted to the Foreign Affairs Office of the Nazi Party (Aussenpolitisches Amt der NSDAP, shortened to APA).
By 1938, she writes, "Hitler was advised that Fleischhauer was placing Germany in embarrassing positions abroad, as he was the kind of ‘anti-Semite who pretends to see a threatening Jew behind every street corner of the world and who tries to deal with the matter in a psychosis of fear and secretiveness’."
At that time, Schirmer stepped down and was replaced by an individual named Kurt Richter, who in addition to being the new publisher was also director of an "International Institute for the Enlightenment of the Jewish Question".