Much of the film is about the hardships of being treated as a refugee rather than a person. There is a lot of talk about being stuck in Casablanca and Laszlo even says “I am also a human being” at one point. An interesting note about the creation of the movie is that “Many Nazi roles were filled by Germans who’s actually fled Germany, including Conrad Veidt who plays the menacing Major Strasser. Veidt was an outspoken anti-‘Facist whose wife was Jewish.” (https://www.bestmoviesbyfarr.com/articles/behind-the-scenes-casablanca/2016/02). Ironically, the movie is about humanizing refugees and here we have actors who act the part of the people whom they have fled from.
A different article relates how the refugees in Casablanca are similar to the refugees seen today in the world. “In the current crisis, the possession of false passports has often been treated as evidence of guilt, but Casablanca attempts to show that the black market is often the last report for otherwise honest people in desperate straits”. (http://www.slate.com/culture/2018/01/watch-the-trailer-for-steven-soderberghs-iphone-shot-thriller-unsane-video.html). The article goes on to say how the world tends to view refugees today as not people, exactly as the movie referenced and made a strong point against. The article says “it depict the victims of war as sympathetic individuals.”