If you're a fan of the Netflix show Black Mirror, go watch the episode called “Men Against Fire” before reading this. It's the one about war.
In this 60-minute science fiction show, soldiers have been (somehow) programed so that when they look at certain people they see them as freaky monsters with pointed teeth and bizarre faces. These people look frightening and non-human. They are thought of as objects, not as people at all. In reality they are themselves terrified, unarmed, ordinary looking people. And they have a tool with which to protect themselves, a stick with a green light. It doesn't kill or injure. The stick deprograms a soldier so that when he looks at someone he sees them as they really are without the monstrous distortion.
Of course a deprogramed soldier is of no use to the military. In “Men Against Fire” the military offers a deprogramed soldier two choices. He can re-experience on an endless loop a recent reality in which he murdered helpless human beings, but this time experience it while seeing them as human beings instead of as “roaches” (what the military calls the intended victims made to appear monstrous), or he can be reprogramed and get back to the untroubled work of extermination.
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