If one had to read one columnist to appreciate the state of contemporary left-wing commentary, my nomination would be Frank Rich of the Sunday New York Times. No well-known leftist columnist better exemplifies the worst aspects of today's left. Virtually every piece is filled with anger, filled with ad hominem responses to arguments, filled with insults of opponents and at the same time devoid of intellectual arguments. A Frank Rich column is essentially a weekly tantrum meant to make his readers nod in agreement and reinforce their contempt for those who differ with them. I offer this past Sunday's column...