The US recognizes - like many of us do - that Netanyahu's - and Israel's - rhetoric has ulterior motives which have no bearing on reality. Old Bibi boy's creating himself a scapegoat to stoke the fears of the ignorant masses so he can hold onto power. The US isn't going to risk a major regional conflict for a loony megalomaniac.
Militants in Sinai shell house, killing family of five, say Egyptian officials (AP)
from the article: Will 2012 bring a new Israeli attitude toward Iran?