from Media Matters for America.
I noticed that when the recent brouhaha over Shirley Sherrod's firing was revealed, mainstream media focused on the embarrassment of the Obama administration and NAACP. The focus, of course, should have been on the deliberate disinformation efforts of right wing media. This article, although it focuses a bit too much on Breitbart's shenanigans, helps to frame the issue on right-wing disinformation campaigns.
I believe that mainstream media's reluctance to frame the issue appropriately is because the ruling class is using right wing media to confuse working people of the US, to deflect their anger onto others and away from the economic collapse caused by finance capitalism. Such a strategy is an old one, but has been very successful. The Nazis were very good at it.