A number of UK mosques are being used to incite hatred, bigotry and intolerance, a Channel Four television documentary revealed Monday. Secretly filmed during a 12-month investigation, "Undercover Mosques" contained sermons showing preachers proclaiming the supremacy of Islam, preaching hatred for Jews and Christians and for Muslims who do not follow their extreme beliefs, and predicting an imminent jihad. British Muslims must "dismantle" British democracy - they must "live like a state within a state until they are strong enough to take over," said one preacher. The investigation showed the influence of Wahhabism, an extreme Saudi Arabian interpretation of Islam, throughout the UK. The program also showed how Saudi universities are recruiting young Western Muslims to train in their extreme theology, who are then sent back to the UK to spread the teachings.