There's not a lot we can say about the tragedy in Tucson. True, our level of political discourse is pretty appalling, but it's been worse--much worse--at many times in U.S. history.
There's no evidence that the killer was motivated by any particular ideology, commentator or political type, and trying to assign blame in that area is simply counterproductive.
There is, however, a stark contrast in leadership styles in terms of the response to the crisis. While President Obama gave a moving speech seeking to promote healing, Sarah Palin went on a petty rant, which is no surprise because that's the type of person she's always been.
While we don't blame anyone on the right, left or middle for Jared Loughner's deranged act, it's sad that we as a society make it so easy for an unbalanced individual to inflict such devastating harm. The hardcore position of a small minority that we cannot, under any circumstances, regulate firearms is ridiculous. No one needs a 30 round clip for a pistol.