Well you benefit from that very same document right here (free speech). The first thing tyrants do is get rid of things like constitutions.

Idolizing a document over human rights is terrible.

Well, to be clear, human rights, other than being a vague philosophical concept, are also a document. Much younger, and much more sensible and uncompromising, but still also a document.

Hopefully if new rights are deemed to be needed, they can be added.