And it is just not the protesters’ apparent allergy to capitalism and suspicion of normal democratic politics that should raise concerns. It is also their temperament. The protests have made a big deal of the fact that they arrive at their decisions through a deliberative process. But all their talk of “general assemblies” and “communiqués” and “consensus” has an air of group-think about it that is, or should be, troubling to liberals. “We speak as one,” Occupy Wall Street stated in its first communiqué, from September 19. “All of our decisions, from our choices to march on Wall Street to our decision to camp at One Liberty Plaza were decided through a consensus process by the group, for the group.” The air of group-think is only heightened by a technique called the “human microphone” that has become something of a signature for the protesters. When someone speaks, he or she pauses every few words and the crowd repeats what the person has just said in unison. The idea was apparently logistical—to project speeches across a wide area—but the effect when captured on video is genuinely creepy…

In the face of the current challenge from Tea Party conservatism, it is more important than ever that liberals make a compelling case for our vision of America. But we will not make this case stronger by allying with a movement that is out of sync with our values. And so, on the question of how liberals should feel about Occupy Wall Street, count us as deeply skeptical.