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Believe it or not, removal of content is mandated on the basis of laws that have been passed by the majority of representatives elected by the people. For example, it is a crime in Germany to publicly glorify wars of aggression and use Nazi symbols or deny the Holocaust. It's also a crime to publish child abuse material.

On a side note, setting up a website deliberately designed to circumvent such laws will itself likely violate the law and might lead to criminal prosecution. While the US government will certainly be protected by diplomatic immunity, other people involved probably won't be protected.