Of course, the absurd premise is that "analysis" of this sort will enable us to understand why this event took place. Yes, yes: if we can just understand, all will be well.
I do not wish to minimize, or to be glib about, the event itself: it is horrible and tragic. Lives have been lost; other lives have been changed for ever. But I find the urge to explain and understand the event through the media and its "experts" to be symptomatic of a profound shallowness in the modern world's view of the ultimate mystery of human nature.
"The Moat, Grange Farm, Kimble" (c. 1922)
Bells in tower at evening toll,
And the day forsakes the soul;
Soon will evening's self be gone
And the whispering night come on.
Blame not thou the faulting light
Nor the whispers of the night:
Though the whispering night were still,
Yet the heart would counsel ill.
A. E. Housman, Poem XVII (untitled), More Poems (1936).