Kern believes that the disaffected teens will gravitate toward evil as a means of making a point, after they have been shut out by peers and authority figures. Trickey had been described as 'a good, quiet kid'. He had had a birthday party the week before. Police officers are re-interviewing the attendees as this article goes to press. The kids were so angry, so frustrated, that these irrational acts looked like the best option to them.
Rage is the dangerous result of frustration, brought on by the kids' perception of injustice.
From what I'm gathering, these kids were isolated and shunned by the cliques and jocks, but, unlike lots of other outcasts, these kids went the violent route. The detailed planning and sardonic comments made on those tapes by Klebold and Harris betray warped cynicism and a convoluted thinking pattern that portrays psychological dysfunction. Of course 'a great man' was not intended to mean wonderful man, but a significant, or notable one. Even their legitimate arguments are ignored. They lose any chance of joining the mainstream.