The left's Tuscon strategy

There is now little doubt that the left is consciously and vigorously using the Tuscon shooting-tragedy as a lever to control speech in the US. This post here from Powerline demonstrates quite clearly their strategy and how they are implementing it in the real world.  At a recent party I ran in to two people who were using Beck's attack on the violent radicalism promoter Francis Fox Piven as an example of how dangerous and poisonous the political climate and discourse has become in the country today.  Both people, quite reasonable sorts, had made a connectionin their own minds between the Tuscon shooting and rancorous political debate and specifically mention Beck as the major culprit.    The background on Piven and her radicalism is on display in the referenced post here and suggests the disinformation tactics are shrewd and effective.