You are wrong in your assumptions in assigning the responsibility to America. I believe that if needed America will contribute of it blood for Israel survival. But it is in America interest to prevent this sacrifice, and I think in Israel interest also. If we won't start the peace process it will be impossible to America declare impartiality to the Middle East conflict and to Attack one of the biggest Muslim nation. Consequently if it does Attack Iran , this action will galvanize the entire area possible to the point beyond repair. To gain the needed Arab governments ( which are afraid of nuclear Iran ) support and to prevent this scenario America and Israel must achieve some kind of satisfactory progress in the peace process. A progress in this enterprise will provide the American with the green light to do what is needed in relation to Iran. And this is time for the Israeli government to realize that time no longer work in our advantage.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Obama must stop demanding the impossible from Israel