Probably because they can't stand to hear Chris Mathews and all the other liberal media with their Obama worship and class,gender and race warfare.
I get your point, but I'd say those three particular manufactured issues tend to be manipulated far more by the left and the media is always willing to lend a sympathetic ear. The right has their own stable of wedges, although the media doesn't give them nearly as much play.I'm not all that liberal, but the idea that 'class, gender and race warfare' is only a problem of the 'liberal media' is laughable at best.