Carbonara was invented at least 3 decades after the American hamburger. When your cuisine is no more traditional or ancient than a burger, you should probably rethink your snobbery.

Granted, when I (out of pure curiosity) ordered and bit into a rubbery charred puck of a hamburger at a restaurant in Rome, I felt similarly violated. The "American sauce" it was served with provided a good laugh. But I shudder to imagine that this is what the Italians think we eat like. Perhaps their indignation is similar.