On 104 acres along the Tigris River in the heart of Baghdad sits a monument to arrogance, incompetence and stupidity.This expansive 21-building campus is the new U.S. Embassy, the largest and most expensive embassy or diplomatic mission ever constructed by any country in the world. The largest current U.S. embassy is in China, and is five acres. The White House itself only occupies 18 acres.Once billed as the only construction project in Iraq that was on time and on budget, the new $592 million U.S. Embassy was supposed to open last month.The project has now been delayed indefinitely due to …