The documentary reveals that fanatics are continuing to peddle a message of hatred in the UK.
This centres on persuading Muslims that the covenant of security that in return for safety and freedom, Muslims do not attack the nation that is their home - has been broken by draconian anti-terror laws and the war in Iraq.
Dispatches discovered that Abu Mohammed, a fanatical preacher based in Europe, managed to make a series of visits to Britain, lecturing to young Muslims in houses in Luton, before being banned by the Home Office in March this year.
He continues to radicalise followers here via the Internet.
Mohammed is filmed by reporter Phil Rees declaring:"We are in a state of war and no covenant exists...British Muslims should know that the British Government will do everything to frighten them, to make them very uncomfortable and they have to be prepared to pay the price and fight back."
Watch and ask yourself:"What will have to happen before democracies take seriously the dictum that they need not be"suicide pacts."