In the midst of the deeply unfunny news coverage of the two young British jihadi volunteers who were arrested on terror charges when they arrived back from Syria, there was one moment of comic absurdity. It seems that before setting off on their mission, Mohammed Ahmed and Yusuf Sarwar found it necessary to place orders with Amazon for those invaluable scholarly treatises, Islam for Dummies, The Koran for Dummies and Arabic for Dummies. Hilarity aside, there is something important to be noted here.