More than two years since the terrorist attacks of 9/11/01, the arts world still seems to have no idea how to respond, says Frank Rich. “The commodification of 9/11 by theater artists is perhaps even more dispiriting than that by the vendors who hawk T-shirts at ground zero. You expect more from artists. You don’t expect more from the entertainment industry, but given how much hot air its players lavish on politics, its current performance is conspicuously dim.”