Well, any mass shooting by a nutjob gets attention, and what with the Batman opening, the booby-trapped apartment and the dyed red hair you've got an interesting story with a good visual, regardless of where it happened. It's dumb that we seem have these National Conversations about persistent in the wake of big news stories, but it's human nature. People talk more about college football culture in the wake of Sandusky/Paterno, tolerance for Muslims in American society during the "Ground Zero Mosque" brouhaha, etc.
It's backwards, in that we're galvanized by the rare and atypical, rather than paying attention to what happens every day, but waddyagonnado?