Larison gets it right:

The gap between the ambitious and aggressive nature of Romney’s proposed foreign policy and the preparation and knowledge needed to conduct such a foreign policy is huge. It should also tell us something that most of the least prepared presidents had the most grandiose and ambitious visions for U.S. foreign policy, and in those cases the U.S. suffered greatly for their misguided and excessive vision and their lack of preparation. 

Hands up who wants a return to Cheneyesque foreign policy? Fanaticism and incompetence don't always go together. But they do here.