walk civilly and carry a straitjacket

I am much interested in all the talk about renewing civility in our political and national discourse in the wake of the Tucson shootings, and I take Paul Krugman's point about the need to well, eliminate eliminationist rhetoric, and the difference between rudeness on the one hand and eliminationist rhetoric on the other. However, I will say this: I do not think that the rhetoric of any right-wing politician, commentator, personality, or pundit led to the tragedy in Tucson. ( I'd like to talk about a couple of actual facts, as opposed to made-up ones. )