There are many who insult religions, "who make fun of them, who make a game out of the religions of others," he said. "They are provocateurs. And what happens to them is what would happen to Dr. Gasparri if he says a curse word against my mother. There is a limit," the pope said.

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When I say "Je suis Charlie," and I have, I am not agreeing with its often pornographic, crude and vicious cartoons. I am supporting Charlie's right to do it. (With a normal press run of 50,000 in a nation of 66 million, not many people were listening to Charlie.)

Even in free-speech America, we have legal limits. You can't directly incite violence, you can't harm others by deliberately lying about them. But you can insult and ridicule and even cause emotional pain. It's the price we pay, and sometimes the price is steep.

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When the pope calls for limits, he aligns himself with the Organization of Islamic States that for more than a decade has been pushing U.N. resolutions to ban "defamation of religion." Critics rightly say that would create an "international blasphemy law."