As a socialist, Kiwitz saw little future and only danger for himself in Germany. In 1937, with help from Rowohlt, he managed to flee to Copenhagen, Denmark, where he met Bertolt Brecht. His residence permit, just three months, was not renewed, forcing him to leave. He then went to Paris, where he again began to fight fascism. An organization of exiled German artists, the Union des Artistes Allemands Libres, was founded in autumn 1937 and Kiwitz became an early member. The group organized an exhibit called "Five Years of Hitler Dictatorship", ("Fünf Jahre Hitler-Diktatur") held at a local union hall. He worked on the exhibition and contributed to the exhibition brochure, "Cinq Ans de Dictateure Hitlerienne", cutting out a piece of linoleum flooring from under his bed and making linocuts depicting torture, courtroom trials and forced labor in the Third Reich. Also while in Paris, he made a woodcut about the Bombing of Guernica and other alleged war crimes.