Again, anger, greed, selfishness, and callousness are not mental illnesses. It makes people feel better to think that someone who would murder another human being for political reasons or just because he enjoys it, must have some mental disease. It's much more frightening to accept that certain people just choose to engage in these destructive behaviors. The idea that the more depraved the crime, the more indicative it is of mental disease, is bunk. Nevermind that few of these nelwy-discovered diseases have etiologies that anyone sufficiently explain.