The Cure For Ultraviolence

LONDON—In the past two weeks, the British Isles witnessed two important developments in the annals of jihadist deradicalization. The first, here in London, was a spectacular failure to deradicalize: Usman Khan, 28, feigned remorse for his participation in a 2012 terror plot and was let out of prison early. Ireland brought home Lisa Marie Smith, a 37-year-old mother and former member of the Irish military who traveled to Syria to live under the Islamic State, and charged her with membership in a terror group.