A notorious Muslim extremist told a demonstration in London yesterday that the Pope should face execution. Anjem Choudary said those who insulted Islam would be "subject to capital punishment". His remarks came during a protest outside Westminster Cathedral on a day that worldwide anger among Muslim hardliners towards Pope Benedict XVI appeared to deepen. The pontiff yesterday apologised for causing offence during a lecture last week. Quoting a medieval emperor, his words were taken to mean that he called the prophet Mohammed "evil and inhuman". He insisted he was "deeply sorry" but his humbling words did not go far enough...