The shocking and disturbing videotaped execution of American journalist James Foley had, besides the most gruesome and obvious, another jarring element: the composed British voice of his murderer, repeating fanatical Islamist propaganda and making terroristic threats in impeccable English. Abdel-Majed Abdel Bary, an up-and-coming rapper who abandoned making music in London to make war in Syria in 2012, is far from the first UK national to embrace the Islamic State of Iraq and Syria (ISIS).