Tolerance in Great Britan

Various pundits are commenting on the fact that at least a part of the London bombing foundation was built by the preaching of the Imams or whoever in the mosques in England. The teachings of hate there could well be responsible if the bombings were home-grown as now suspected. I wonder how long the British would tolerate Christian evangelists using their pulpits over there to advocate the murder and decapitation of Islamists?