You know, I have to find myself agreeing with Sarah Palin on this point.
"...journalists and pundits should not manufacture a blood libel that serves only to incite the very hatred and violence that they purport to condemn."
We SHOULDN'T go around saying "this group of people is responsible for this crime, and should therefore BURN IN HELL!!!" without any evidence at all. Did the rhetoric from the "right" use a lot of shooting metaphors? Yes. Did it have any affect on the criminal? Who knows? The guy's a nutcase who was apparently planning it for some time.
Look, instead of blaming the media/pundits/politicians; why not blame someone like, oh, I don't know, the guy who actually fired the gun? And maybe, just maybe, instead of weeping over the state of mental health care in this country, perhaps one might take an easier and more practical step to make such crimes less likely in the future by reintroducing the ban on oversize magazines that let you turn handguns into pocket-sized submachine guns?