There’s a scene early on in the French documentary Salafistes (“Jihadists”) where the camera spans over a throng of people gathered in a village in northern Mali: the crowd is there to watch as the “Islamic Police” cut off a 25-year-old man’s hand. The shot zooms in as the young man, tethered in ropes around a chair, slumps over, unconscious, while his hand is sawed off with a small, serrated blade.