CRAZED Islamic State (ISIS) jihadis have sent letters to European civilians ordering them to convert to Islam within three days or face being DECAPITATED in their own homes. Bloodthirsty Daesh Islamists posted notes through the doors of dozens of random neighbours in several cities across Sweden, including the capital Stockholm, threatening to murder "non-believers" in a terrifying campaign of violence. Sweden is now on lockdown after the chilling letters pledged to behead innocent civilians and then "bomb your rotten corpses afterwards".