You are right. It might be not a easy move. However, America has no other options if it wants to remain an hegemonic power. It tried engagement with Iran and does not work. Noam Chomsky wrote a book "Hegemony or Survival". The truth is that for a country like America the real equation is hegemony as survival. No hegemony = no America...and obviously the ensuing consequence is no liberal Europe. Lots of lunatic liberals in Europe believed that they could 'survive' without an hegemonic America. Some in Europe prefer Ahmedinajad today as prefered Hitler in the past. they were ready to give up Checoslovaquia in the past to appease the beast, and are ready to give Israel now to appease the new beast. Israel will hopefully thwart those dirty dreams.
U.S. defense contractor accused of copying secret military documents (Reuters)
from the article: Barak: Iran poses no immediate existential threat to Israel