The Islamic State ­appears to be starting to fray from within, as dissent, defections and setbacks on the battlefield sap the group’s strength and erode its aura of invincibility among those living under its despotic rule. Reports of rising tensions between foreign and local fighters, aggressive and increasingly unsuccessful attempts to recruit local citizens for the front lines, and a growing incidence of guerrilla attacks against Islamic State targets suggest the militants are struggling to sustain their carefully cultivated image as a fearsome fighting force drawing Muslims together under the umbrella of a utopian Islamic state. The anecdotal reports, drawn from activists and residents of areas under Islamic State control, don’t offer any indication […]