Possibly as revenge or punishment for a crime committed, particularly if it is a crime against children or innocent people. What do you do with repulsive cowards who slaughter innocent children or who slaughter nuns working for charitable organisations? Generally, I am against torture, but I can understand the horror and devastation that people go through when their children are tormented and slaughtered mercilessly.
You know if these cowards have some grievance against authorities in Belgium or authorities in Chechnya, or someone in Yemen, let them go after those responsible. I don;t see any justification for these disgusting cowards to slaughter innocent children or civilians…