‘It is true that morality has been often enough a way of ducking hard political questions by reducing them to the personal. In the so-called war against terrorism, for example, the word “evil” really means: Don’t look for a political explanation. It is a wonderfully time-saving device. If terrorists are simply Satanic, then you do not need to investigate what lies behind their atrocious acts of violence. You can ignore the plight of the Palestinian people, or of those Arabs who have suffered under squalid right-wing autocracies supported by the West for its own selfish, oil-hungry purposes.
The word “evil” transfers the question from this mundane realm to a sinisterly metaphysical one. You cannot acknowledge that the terrible crimes which terrorists commit have a purpose behind them, since to ascribe purposes to such people is to recognize them as rational creatures, however desperately wrongheaded. It is easier to caricature your enemy as a bunch of blood-crazed beasts – a deeply dangerous move, since to defeat an opponent you have first to understand him. The British tabloid press may have seen the IRA as gorillas rather than guerrillas, savages with no rationale for their actions, but British Intelligence knew better. They understood that Republican murders and massacres were not without a purpose. Indeed, to label your enemy as mad is to let him, morally speaking, off the hook, absolving him of responsibility for his crimes’.
– Terry Eagleton, After Theory (New York: Basic, 2003), 141–42.