On its surface, Look Who’s Back appears to be a politically incorrect excuse for unscripted comedy: an actor dresses up as Adolf Hitler and parades around 21st-century Germany. But this is no mere Ali G, Borat, or even the Amazing Racist. Actor Oliver Masucci doesn’t don the iconic mustache and hair to play history’s greatest monster as a mere fish-out-of-water dolt built specifically for jokes. When he’s playing Hitler, he’s trying to nail that character as closely as possible....