It's not just conservatives who are sick and tired of Jon Stewart hiding behind his "I'm a comedian" excuse when called out for his dead-serious liberal pontifications.
Even liberals like Salon.com's Will Bunch are tired of the "Daily Show" host's faux sanctimony, even as he cheers Stewart's liberalism and calls on the comedian to embrace it.
From a June 21 War Room blog post (emphases mine):

For years, liberals argued that it was absurd to argue the media had a liberal bias when Washington was dominated by Republican majorities. But now, when Washington is dominated by the Democrats, some are still clinging to the odd notion that the media "bends over backwards" against the liberal-bias charge and coddles conservatives.