The European Convention of Human Rights explicitly protects freedom of expression.
>On Thursday, the European Court of Human Rights (ECHR) upheld her 2011 conviction for “disparagement of religious precepts,” a crime in Austria. The facts of what E.S. did are not in dispute. She held “seminars” in which she presented her view that Muhammad was indeed a child molester. Dominant Islamic traditions hold that Muhammad’s third wife, Aisha, was 6 at the time of their marriage and 9 at its consummation. Muhammad was in his early 50s. The Austrian woman repeated these claims, and the Austrian court ruled that she had to pay 480 euros or spend 60 days in the slammer. The ECHR ruled that Austria had not violated her rights.
https://www.theatlantic.com/ideas/archive/2018/10/its-not-fr...
> The exercise of these freedoms, since it carries with it duties and responsibilities, may be subject to such formalities, conditions, restrictions or penalties as are prescribed by law and are necessary in a democratic society, in the interests of national security, territorial integrity or public safety, for the prevention of disorder or crime, for the protection of health or morals, for the protection of the reputation or rights of others, for preventing the disclosure of information received in confidence, or for maintaining the authority and impartiality of the judiciary.