In his airplane interview in the flight taking him from Sri Lanka to the Philippines, Pope Francis commented on the limits of freedom of speech:
[Question] Yesterday morning, during mass, you spoke of religious liberty as a fundamental human right. With respect to the different religions, up to what point can we go in terms of freedom of speech, that also is a fundamental human right?
[Pope:] Thank you for this intelligent question! I believe that they are both fundamental human rights: religious freedom and freedom of speech. We cannot...you are French, right? Well, then, let's go Paris, let's speak clearly. We cannot hide a truth today: each one has the right to practice his religion, without causing offense, freely, and we all wish to do this.Secondly, we cannot offend, make war, kill, in the name of religion, that is, in the name of God.That which is happening today surprises us, but let us always think of our history: how many wars of religion have we known! Think only of the Night of Saint Bartholomew [St. Bartholomew's Day Massacre]! How can we understand that. We also have had our sinners regarding this, but we cannot murder in the name of God, it's an aberration. To murder in the name of God is an aberration. I believe that is the main thing on religious liberty: we must practice it in liberty, without causing offense, but without imposing or murdering.