What is wrong with a little anti-government rhetoric?

U.S. Rep. Gabrielle Giffords was seriously wounded in an apparent assassination attempt. Nobody but the lunatic who shot her could feel good about that, and I hope she recovers.
But it is impossible to miss the fact that many folks are blaming this, not on the shooter, but on anti-government rhetoric.
And while I would not say that everybody who is whining about anti-government rhetoric are those who sit on the left side of the aisle, it seems that most of them are.
So, let’s pretend that we all stop our anti-government rhetoric.
What remains?
Pro-government rhetoric, sometimes called propaganda.
Or no rhetoric at all, which is what most governments want if they can’t have propaganda.
I don’t like the sound of either. So why are so many on the left advocating for it?
I am sticking with anti-government rhetoric, since they are, after all, nothing but grubby politicians.