“Chicago 10,” Brett Morgen’s semi-animated, semi-documentary attempt to make the ’60s cool for a new generation of kids, does the opposite. It is a narrow, glib dollop of canned history, an affirmation of received thinking rather than a challenge to it. Squandering 40 years of hindsight, Mr. Morgen is content to trot out the tired mythology of the era one more time. His mélange of styles and techniques shows visual ingenuity, but not much in the way of historical insight. He takes the intricate, frequently self-contradictory theater of the New Left at face value, and panders to the credulity of the audience by breathing new life into old clichés. Groovy! Power to the people!