In the next day or two, I'm certain two things are going to come up in the wake of the assassination of the Hon. John M. Roll, as well as the attempted (so far) assassination of Rep. Giffords. The right wing is going to point out that this terrorist was mentally disturbed (likely true, as are most terrorists), and folks on the left are going to feel guilty and start pretending that it would be inappropriate to 'exploit' this terrorist act as a political issue.
I'm sorry, but after the years of the radical right intentionally undermining people's trust in government, eroding gun control, using racist slurs, and violent images (Sarah Palin just last year published an image of Rep. Giffords in the crosshairs of a gun sight), this IS political.
To pretend otherwise is no different from an abused spouse saying "If I had just been more polite, my partner wouldn't have hit me so much."
There have been increasing violent threats and attacks by the radical right in the last four years, including mail bombs just this weekend against government officials, all of them Democrats, by the way -- a distinction that, if history is any indicator, will spread to moderate Republicans next, followed by any elected official. We can thank, among others, the Supreme Court's decision that the second amendment provides individuals with the right to take violent action against the government
In the meantime, after-the-fact platitudes by Tea Party folks will ring hollow, unless they follow it up with concrete action in their rhetoric, membership, and funding.