As long as treating the symptoms rather than the disease is easier or more profitable or more likely to maintain the status quo for those in power, that is the course that will be taken.
I often wonder why "The Race for the Cure" is not "The Race for the Cause".
I fully expect acts of this nature, with the concommitant reactions you write about, to continue and increase as the things we have come to expect do not materialize. The realization that much of what we have been conditioned to believe is pure fiction is a powerful awakening.

A piece offering my perspective on the Arizona mass shooting, and specifically how instiutionally-defined "mental disorder" is used by power structures to conceal the broader socioeconomic context in which these tragic events occur.
"The possibility of madness is therefore implicit in the very phenomenon of passion."
- Michel Foucault (Madness and Civilisation)
The mass shooting in Tuscon, Arizona was a sad and unpleasant event, but it was fully expected by those of us who stay informed. We couldn't predict exactly where such an event would occur, when it would occur or how it would occur, but we knew that it was only a matter of time before people began lashing out against "the system" in violent ways. In early 2010, a man lashed out by flying a plane into an IRS building in Texas, but this time the violence directly targeted a federal politician, who is currently hospitalized in critical condition.
The shooter was Jared Loughner, a 22-year old who was "studying" in an Arizona Community College. Since the event, many people have obviously started digging through every single detail of this man's history, from the "incoherent" and "inappropriate" things he said in class, to his "disturbing" postings on the Internet and his drug-related criminal record. There were all kinds of different "warning signs" available to foreshadow the shooting and potentially prevent it, if only those who had observed him had been more vigilant and took some action.
Perhaps it is true that Loughner's parents, friends or classmates could have deciphered his murderous plans and prevented the shooting. But does that mean this rampage was an isolated incident, specific to a hopelessly deranged individual who had inexplicably fallen from the good graces of "normal" society? Frankly, the whole post-event routine reminds me of CNBC pundits attempting to explain a large market sell-off by referencing a mish-mash of "unexpected" economic events and "temporarily" negative data.
Full piece - http://peakcomplexity.blogspot.com/2011/01/lunatic-is-in-my-head.html