> the Universal Declaration of Human Rights, but other countries might have determined their own (additional) set

It works in opposite way. Universal Declaration universally declares nice stuff, but member countries are free to restrict and persecute the freedom of """hate speech""", the freedom of """extremist expression""" et cetera et cetera et cetera

UDoHR is just a words, intellectuals are seduced by words and dismiss the fact UDoHR doesn't works anywhere except (maybe) America