When it comes to tactics and ideas, I don't know about expressionism, but this film explores a question that should be an eternal question: should mentally ill criminals go unpunished? There are a lot of discussions on this topic. Those who claim the rights of the mentally ill include Flying Over the Lunatic Asylum, and there are crime films based on countless real events that support the execution of the heartbroken murderers. The people on patient rights will probably see some change, too, along with neutral films like Shutter Island. But the films just listed are all after M, and maybe the discussion about psychopathic murderers starts here. M is actually neutral, and there are very good reasons for both sides. This can be seen from the swaying attitude of the people in the trial drama. The film failed to discuss the result, which is very real and helpless, but admonishing people to be optimistic about their children is really the most sincere advice to all the ugly and unreasonable things in society.
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