Saudi money and influence have transformed this once-tolerant Muslim society at the hem of Europe into a font of Islamic extremism and a pipeline for jihadists.Kosovo now finds itself, like the rest of Europe, fending off the threat of radical Islam. Over the last two years, the police have identified 314 Kosovars — including two suicide bombers, 44 women and 28 children — who have gone abroad to join the Islamic State, the highest number per capita in Europe.