dark force of evil

At the inauguration, the president was, or, to be more precise, his script writers were, exceedingly eloquent in describing what they think is the dark force of evil. That they hide in the darkest corner of the world. That they are hatching their bloody plan in their shadowy hideout. That they have not mercy nor compassion. Nobody would feel odd if the descriprions were actually taken from numerous fantasy novels that involves a struggle against the dark, the hedious, the cold, the evil. I wish I could reproduce the exact wording of the first five minutes of the inauguration speech, for it was, if taken out of context, almost worth listening for the indulgent pleasure it brought to me just as a well-written fantasy novel can let you submerge in its fictious world.

His eloquence in describing the evil seems somewhat pararel to our common tendency to produce an impressive and memorable curse than a compliment of the same quality. Are we, after all, a wrethed species who are only good at describing the negative, if not being the negative?