Just watched a TV documentary on the Warner Brothers and their film studio, which revealed a range of things I never knew about how the studio was in the forefront of opposition to the Nazis long before WWII and how, as one interviewee said, Jewish studio chiefs were censored by the Catholic controlled (and rather pro-Nazi) Production Code Administration (aka Hays Office) http://www.novelguide.com/a/discover/egd_02/egd_02_00428.html to ensure films were suitable for Protestant audiences.
Google turned this up as a fair summary of some of the issues covered in the program. http://www.learcenter.org/pdf/WWRoss.pdf