wonder what event triggered these two boys to think there was virtue in what they were doing.
was it the drone killing of children in afghanistan? http://www.policymic.com/articles/20884/is-america-like-adam-lanza-u-s-drone-strikes-have-killed-176-children-in-pakistan-alone
i suspect that a sense of double standards in the world radicalises young men with a strong feeling of righteousness. righteousness that turns to outrage. before they have the experience of life to realise it is a mess that does not get fixed by adding more violence to the violence that already exists. and before they experience love and have children and tame the animal spirits that informs young manhood.
these kinds of folks aren't sociopaths. they do things because they have a strong sense of virtue not because they have none. it is just misdirected.