Predictable Enough: when the bullets actually start to fly, they come from the left. This fits perfectly with 'the ends justify the means' meme so recently and flagrantly flogged from the left over ObamaCare passage. It's the left, of course, that feel the merits of a 'good idea' should have absolute suasion over opposing ideas.
Conservatives on the other hand, naturally take pause at the idea of a 'single shooter' - such a statement is a solitary and unilateral political act performed by a single actor - in absolute violation of the first idea that we hold so dear: that our government (and thus our political action) should be of the people and by the people.
Here's Louise Slaughter of recent fame calling for violence from the left in the 'coded rhetoric' she pretends to deplore: "It's more disturbing to me that Republican leadership has not condemned these attacks and instead appears to be fanning the flames with coded rhetoric." Of course, GOP leaders have been condemning reports (mostly unsubstantiated) of violence all morning.
Of course, the left got the message, and took action instantly.