I didn't say that. It's just your opinion appears to lack historical perspective. This sort of fracturing isn't a physical law of some sort. It's all very fluid and quite open to changing drastically. One moment you have the 200+ nations of the Holy Roman Empire, the next you have Germany. One moment you have Yugoslavia, the next you have a fracturing that continues even today.
The US formed under one banner, nearly tore itself apart more then once, fought an horribly bloody war that dwarfs what goes on in Iraq now, and then reigned supreme not even a century later.
Iraq doesn't have to be what it is. And assuming it does lacks perspective. That's all.