The perils of false equivalencies and self-proclaimed centrism

(updated below)

New York Times, Thursday: 

Jon Stewart announced his much-awaited "big announcement" on Thursday's edition of his late-night program, "The Daily Show." He plans to stage a rally in Washington to counter what he identified as extremists on either side of the political spectrum. . . .

He later labeled it a "Million Moderate March." The purpose, he said, is to counter what he called a minority of 15 percent or 20 percent of the country that has dominated the...