On a Tuesday in late October, an Afghan cleric, Sheikh Raheemullah Nangahari, was giving a speech in his madrassa in Peshawar, near Pakistan’s border with Afghanistan, when a blast ripped through the prayer hall, injuring him and killing eight others. It was the latest attack in a deadly rivalry between the Taliban and the Islamic State’s faction in Afghanistan and Pakistan, which calls itself the Khorasan Province. Raheemullah, a senior Taliban official, is believed to have been targeted by the Islamic State because of his work spreading propaganda against the extremist group. In written tracts and speeches, the sheikh has […]