Some pundits are puzzled that respectable mainstream Democrats and  "progressives" are no longer free-speech absolutists but rather are enthusiastic defenders of the government's massive effort to squelch expression on the social media platforms. (Glenn Greenwald is one of those puzzled pundits.) The center-left goes so far as to smear the exposers and critics of government censorship as tin-foil-hatted conspiracy theorists. For example, Matt Taibbi is called a "so-called journalist" for his work on the Twitter Files, despite his award-winning career in investigative reporting. And look how...