Initial discussions began to take place in 1938 among Nazi ideologues such as Julius Streicher, Hermann Göring, Alfred Rosenberg, and Joachim von Ribbentrop.[19] Ten percent of Jews under German jurisdiction by that date were Polish nationals. Józef Lipski, the Polish ambassador to Germany, expressed his country's reluctance to take them back, and the Polish government decreed that Polish passport holders would not be permitted to return except under specific conditions.[20] When Ribbentrop raised the matter with French foreign minister Georges Bonnet in December of that year, Bonnet expressed French reluctance to receive more German Jews and inquired if measures could be taken to prevent their arrival.