Clooney’s work as a director includes “Confessions of a Dangerous Mind,” “Good Night, and Good Luck” and “The Ides of March,” good films all. He also directed the period football comedy “Leatherheads,” proving his fallibility. “The Monuments Men” deals in an entirely different genre, but there’s a similar tonal indecision at work here. Now and then the film goes for the jugular, emotionally speaking, as when Murray’s architect tears up listening to his family’s homemade recording of “Have Yourself a Merry Little Christmas.” That scene should kill, yet somehow it doesn’t. It’s not Murray’s fault: The scene needed a simpler, straighter attack, not all the fancy intercutting with field hospital trauma footage. Realism schmealism: This is a Hollywood movie. But that sort of scene takes you out of the movie you’re trying to invest in.