They find pleasure in hurting and in the pain of others. They literally can not empathize with the people that they hurt. This is the oldest reference I've seen to the "what if you didn't have breakfast" meme.
I have a suspicion that the low IQ of Aztec-types from south of the border yields a similar empathic deficit.
Washington Post editorial page editor (((Fred Hiatt))), a bloodthirsty neocon who used his position to shill America into the war in Iraq and push forced vaccines, died on Monday after suffering from sudden cardiac arrest.