"In the end it was Jack Warner who brought the rest of Hollywood on board. By using the techniques of 'March of Time,' he was able to blend melodrama, agitprop and a remedial history lesson into the Warners production 'Confessions of a Nazi Spy.' The film made it through the censor boards and onto American screens in the spring of 1939, only a few months before the outbreak of war in Europe. By then, as Doherty pointedly notes, even the most optimistic of Hollywood’s businessmen had concluded that Nazi Germany was no longer a viable outlet for American movies, and was unlikely to be so again for the foreseeable future."
Dave Kehr in The New York Times reviews Thomas Doherty's Hollywood and Hitler, 1933-1939.