"every relationship with Germany, in the area of commerce, art, science, sports and traffic should be discontinued, so that Germany is economically and otherwise crushed." Fles would later put this sentiment into practice. He sold his business that depended largely upon selling imported German merchandise, and, in 1936, served on the planning committee for De Olympiade Onder Dictatuur (The Olympiad under Dictatorship), which served as counter to the summer Olympics being held in Berlin. Additionally, Fles carried on correspondences with other leading thinkers of his day, including an extended debate with Henri Polak regarding the nature of socialism and Fles' determined opposition to Zionism. Fles felt himself to be Dutch, and saw Zionism as further separating Jews from their non-Jewish Dutch neighbors while reinforcing the image of the Jew as a foreigner. Instead, Fles favored assimilation into the cultures in which Jews found themselves. He endorsed mixed marriages to accelerate this process. Fles gathered many of his thoughts from this correspondence into the 1939 pamphlet Weg met het zionisme! (Down with Zionism!). Broadcasting Fles became involved with Vrijdenkers Radio Omroep (VRO) (Freethinkers Radio Broadcasting), which had been established in 1928 as an outreach program of the freethinkers' association De Dageraad (The Dawn). In 1929, the newly established Dutch Radio Broadcasting Control Commission labeled the group's material as subversive, and began to monitor its broadcasts closely. Fles' radio speech Los van de kerk (Free from the Church) was banned altogether, and many other broadcasts were censored for their subversive content, although they later found an audience in print form. In 1933 Fles challenged the secretary of the Radio Broadcasting Control Commission regarding the lack of support VRO received from the government. He pointed out that the 1930 census had shown that the number of "unchurched" citizens had risen sharply, and, since this was VRO's intended audience, it should receive commensurate support. However, in that same year broadcast content restrictions were sharply tightened and, in 1936, VRO's broadcasting license was revoked. However, documents from the organization show that Fles was elected to the VRO's general board, showing that the organization continued to work toward regaining the right to broadcast. The Olympiad Under Dictatorship When the 1936 Olympic games in Berlin were declared off limits to Jews and other groups that the Nazi government deemed undesirable, Fles was among a group of Dutch businessmen and politicians who organized De Olympiade Onder Dictatuur ("The