> This is a false argument. Speech is not "harming someone".
it is indeed!
"This article reflects the tremendous interest in the freedom of information in the postwar years. The Soviet Union proposed an amendment that would deny this right to Nazi and fascist groups. This forced the drafters to discuss the question of how tolerant an already just society should be of intolerant groups like Nazis. Taking together Articles 19 and 7, they solved the dilemma by giving everyone two rights: the right to free speech (subject to the limitation of Article 29) and the right to be protected against hate speech."
they're granted by The Universal Declaration of Human Rights
http://ccnmtl.columbia.edu/projects/mmt/udhr/article_19.html
"Any advocacy of national, racial or religious hatred that constitutes incitement to discrimination, hostility or violence shall be prohibited by law."
https://www.article19.org/pages/en/hate-speech-more.html