As they went on their rampage, the men who killed 12 people in Paris this week yelled that they had “avenged the prophet.” They follow in the path of other terrorists who have bombed newspaper offices, stabbed a filmmaker and killed writers and translators, all to mete out what they believe is the proper Koranic punishment for blasphemy. But in fact, the Koran prescribes no punishment for blasphemy. Like so many of the most fanatical and violent aspects of Islamic terrorism today, the idea that Islam requires that insults against the prophet Muhammad be met with violence is a creation of politicians and clerics to serve a political agenda.

One holy book is deeply concerned with blasphemy: the Bible. In the Old Testament, blasphemy and blasphemers are condemned and prescribed harsh punishment. The best-known passage on this is Leviticus 24:16 :

Source: Fareed Zakaria, washingtonpost.com