For the first time in years now, the United Nations General Assembly has broken with what had become something of a tradition - passing an annual resolution condemning so-called "defamation of religion".
It is one thing for the UN to condemn actions to provoke inter-religious hatred. No one wants to see the world's societies riven with hatred, though it is worth remembering that much of the hatred comes from religious conservatives who refuse to tolerate sexual freedom (especially that of women), female emancipation, and any expressions of erotic love outside of heterosexual monogamy. Even in Western societies we see this in the emotive opposition to abortion rights and same-sex marriage. It's another thing to become so focused on this issue that important kinds of speech are stigmatised and even prohibited. There is a public interest in scrutiny of religion, and it should be a fair target for criticism, denunciation, or satire.
At any rate, we should always err, if err we must, on the side of freedom of speech. Whatever lines are drawn in the area should allow bold speech that might offend - and this includes various forms of anti-religious criticism and satire. Such a liberal attitude to speech might permit some ugly speech, but the long-term effect would be to reinforce a valuable lesson: ideologically opposed groups of whatever kind - religious, political, or philosophical - must make their own way, enduring criticism, and even satire, from their opponents, without asking the state to interfere.
(For further elaboration of these sentiments, you can see my chapter on free speech in Freedom of Religion and the Secular State. This is a theme of the book, and I discuss some of the important case law in detail.)