QUOTE(LucresSerebii @ Apr 22 2007, 02:36 PM)

But souppose someone close to you was killed? well then, would you still indifferent? Of course not. (Or, at least, I hope not.

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Probably not indifferent. Although if he or she was killed by someone, I'm pretty sure I wouldn't feel much different than if he or she had died of natural causes.
But that's something that affects me directly. You could emphasize and sympathize with the friends and family of the deceased in these shootings. But then it only makes sense that you do the same for the hundreds of thousands of others who die everyday. Does the victim of a highly publicized school shooting deserve a million times more mourning than the obscure, yet excruciatingly painful suffering of someone with shingles? Or the sufferer of a neurodegenerative disease, whom his/her loved ones have to watch as s/he slowly loses his/her intelligence, personality, character, and sanity over the course of years, eventually dying in body as a drooling vegetable whose mind was long since dead?
Of course, feeling sorrow for every single tragedy in the world is crazy. But it makes no sense to feel it only for those that make it onto the front pages. What benefit does our sorrow do for the victims anyways? They're dead. They don't care anymore. Any time spent mourning for them only delays you from accomplishing more fruitful tasks. Things that might even help to prevent or offset future suffering.
So I acknowledge that bad things happen to people who don't deserve it... nobody really deserves to suffer. But it doesn't help to mourn. If it was your death, would you rather a million people get all depressed over it, or that they go on with their lives?