The outpouring of hatred triggered by the Arizona shooting is different from the usual animosity from liberal ranks. This time, there's a definite admixture of fear. There are some liberals who have tried to take the high road; in so doing, they ignored "excesses" on their own side. But the ones who are belting out do show they're scared of something. Which leads to the question, what are they so afraid of? Rush Limbaugh, the "harmless little fuzzball?" Glenn Beck? The Tea Party, home of the protests where the protesters pick up their own trash? Sarah Palin, at her nastiest...