“’I’ve almost come to the conclusion that this Mr. Hitler isn’t a Christian,’ muses merry murderess Abby Brewster early in the first act of Arsenic and Old Lace, and to tell the truth I’m beginning to think I’m almost as far behind the curve as she was. Recent new productions at the Met suggest strongly that Peter Gelb either doesn’t quite know what he’s doing or else, if he does know, has some wildly inappropriate ideas about what music drama is supposed to be.” Our own JJ (not pictured) muses on “Peter’s Principles” at Musical America.