Converts to Islam are likelier to radicalise than native Muslims

DECADES before he murdered four people outside the Houses of Parliament, Khalid Masood was a schoolboy from well-to-do Tunbridge Wells named Adrian Russell Ajao. Investigators may never learn the true motives for his attack. But one of the few facts known for certain is that Masood’s case fits into a broad but poorly understood trend: Muslim converts in the West are much likelier than their native-born co-religionists to engage in terrorism, or travel abroad to fight for jihadist organisations like Islamic State (IS).