What's wrong with fighting for Oil, survival, & life as you know it?
I'll just say "Blowback" as a one word answer.
For a much better answer, I will say hatred and unintended consequences. The current war in the middle east, if it is for oil, is obviously not helping the world at large.
George Bush could of said in 2002, "I ask this nation to dedicate itself to throwing off the shackles of dependance on foreign energy." If he had then invested half the money expended on the war in iraq in america, developing infrastructure, energy sources and conservation the results would have been incredible. 50 + nukes coming online now with probably another 25-50 over the next three years. Probably a 5-10 mpg increase in average vehicle fuel consumption by now. Maybe even a few high speed rail and enhanced freight rail lines as well. It would also have helped the economy in quite a considerable way.
Instead it's all gone, for no gain, only loss. All it's built is hatred in the world and damaged the American economy. Once 2 of the 3 big American auto companies go under the economy will be shattered. When some one who has observed a big chunk of his family die decides on revenge by carrying out a WMD attack on the US things will just get worse.
Yep "blowback" is the answer.