Have you heard the one about the Muslim who wakes up one day to discover he is a Jew? Some of Britain's best-known comedy writers risk causing offence by lampooning radical Islam on the big screen.

David Baddiel, the Jewish-born comedian, and Chris Morris, the humorist behind Brass Eye, Channel 4's controversial satire, are both launching films that mock suicide bombers and extremists.

The plot of Baddiel's film, The Infidel, which will be released in April, revolves around a Muslim family man, played by Omid Djalili, the comedian, who suffers an identity crisis when he finds out that he was adopted after being born to Jewish parents.

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