David and Jonah are obviously right that the immoral rules of engagement (ROE) the commander-in-chief has imposed on our troops have encouraged Islamic State jihadists to endanger civilians – not that terrorists need much encouragement in that regard. As David observes, this turns the laws of armed combat on their head.
I’ve been venting about this for a number of years now. The driving purpose of international humanitarian law is the protection of civilians. What makes honorable combatants honorable, and what triggers the international-law protections they are owed if captured, is their adherence to venerable standards requiring that they, among other things, identify themselves as soldiers, carry their weapons openly, and confine their combat operations to legitimate military objectives.