"A title card at the beginning of the film identifies the year as 1976, but everything looks like 1924. "

The film is based on a bestseller of the times by Hugo Bettauer, a satirical utopia with the same title. It was a satire, not science-fiction.

"This film is preaching to the choir. In 1924, a few people were already aware of the growing trend of European anti-Semitism and its danger to everyone. But most adults in 1924 either didn't give a damn about European Jews, or actively supported the politicians who advocated "relocation" of unwanted Jewish citizens."

This unfortunately shows a lack of knowledge, at least of the history of Vienna. (too long to explain here, just research it. ) Bettauer, author of the novel, was shot 5 times on march 10, 1925 by right-winger Otto Rothstock, and died on the next day, becoming the first prominent victim of the rise of national-socialism in Austria. 16 years later Ida Jenbach, co-author of the script, was deported to a concentration camp from which she never came back.