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The popular culture has also lowered the threshold on public shaming rituals. It is not only suppressing certain speech on college campuses, but making public denunciation of certain classes of people into a form of popular entertainment. The masters of the funny cheap shot are comedians Jon Stewart and Stephen Colbert, who routinely and cleverly skewer conservatives as stupid bigots. After the Supreme Court ruling on same-sex marriage, for example, Stewart asked what was wrong with opponents of same-sex marriage, as if a view held for thousands of years, even not very long ago by both Barack Obama and Hillary Clinton, were incomprehensible. The use of humor is a cultural trick. It provides a cultural permission slip to be nasty because, or so the assumption goes, the enemies of "the people" are so unattractive that they deserve whatever Stewart or Colbert throws at them. When Stewart compares Senator Ted Cruz to the Harry Potter character Voldemort, he knows we will then think of Cruz as the book's author describes Voldemort, "a raging psychopath, devoid of the normal human responses to other people's suffering".
It may seem futile to complain about the crudeness of American mass culture. It has been around for decades, and it is not about to change anytime soon. The thin line that exists these days between politics and entertainment (witness the rise of Donald Trump) is undoubtedly coarsening our politics. It is becoming more culturally acceptable to split the world into us-versus-them schemata and to indulge in all sorts of antisocial and illiberal fantasies about crushing one's enemies.
Only a few decades ago most liberals had a different idea of tolerance. Most would explain it with some variation of Evelyn Beatrice Hall's line about Voltaire's philosophy of free speech: "I disapprove of what you say, but I will defend to the death your right to say it". That is no longer the case. It is now deemed necessary, indeed even noble, to be intolerant in the cause of tolerance. Any remark or viewpoint that liberals believe is critical of minorities is by definition intolerant. A liberal critique of conservatives or religious people, on the other hand, is, again by definition, incapable of being intolerant. It is a willful double standard. For liberals, intolerance is a one-way street leading straight to conservatism.
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Kim R. Holmes (The Closing of the Liberal Mind: How Groupthink and Intolerance Define the Left)