In reading about the horrific tragedy in Norway, I was trying to think of how, even to a diseased mind, it would make sense to mow down a large number of trapped unarmed young people. How could you possibly think it would bring credit to your cause (whatever it is)?
I know I may be engaged in the futile pursuit of trying to make sense of the actions of someone who has to be crazy, but such people do not seem to be crazy in the sense of having no idea what they are doing. This guy was clearly a coldly calculating person, planning the murders with great precision.
So what is it that causes their calculations to go so awry in the one particular area of gauging the likely reactions of ordinary people to their actions? Why can’t they see that it will cause people to recoil in disgust?

