They have to give citizens a shield, a protection, against their government and their fellow men and enable them to life a free life. This leads to the question if the shield may be used to justify attacks against others. In my opinion, there are limits to freedom of speech just as there are limits to any other basic human right. The first and main one is that of individual responsibility. Individual responsibility, by the way, is also one of the basic principles of Liberalism.
Freedom of speech is a right.
It is a right given to all citizens of the world, although unfortunately not all of them actually enjoy it, with the purpose of enabling them to speak freely in a free society. Freedom of speech may not be used to threaten, insult or limit the freedom, dignity and privacy of others. In the ideal situation, everyone would have enough sense of responsibility not to abuse freedom of speech. In practice, this is obviously not the case. Therefore, in my opinion, an ideological and legal framework has to be found to limit freedom of speech.