Freedom of speech does have legal limitations. Always has and always will. This is true of every western nation. Even the USA.
If you slander someone they can take legal action.
If you libel someone you can take legal action. (Recent examples: Heard/Depp, Giuliani/false claims about multiple things, Fox News/false claims about voting machines).
If you conspire to commit an illegal act - that is a crime.
If you incite others to commit an illegal act - that is a crime.
Freedom of speech does not protect you in such circumstances.
This is not anything new.
Julius Streicher was rightly hanged because of what he published, in the most extreme case.
Those being investigated and prosecuted for incitement over things they wrote on various platforms will have their day in court.
Similar things happened during the much more serious rioting in 2011.