| THE Dutch secret service has been infiltrated by an Islamic extremist linked to the killer of Theo van Gogh, the Dutch film-maker whose murder has accelerated Holland's transformation from one of Europe's most tolerant countries into a society increasingly polarised by fears about immigration. Intelligence sources said last week that a mole working for a terrorist group codenamed the "Hofstad cell" had been arrested on suspicion of relaying information collected by the authorities to its members. The disclosure has compounded the embarrassment of the security services, which have admitted they were watching Mohammed Bouyeri, the 26-year-old Dutch-born Moroccan charged with van Gogh's murder, from August 2002. |