That is the process Obama is following. America is not answerable to Israel. There is nothing to stop Israel following its own path if it disagrees with America. The Charter states use of force comes after all means of dialogue to resolve the issue have been exhausted. Force is an absolute last resort. Israel of course has never honoured its responsibilities regarding the UN Charter so it probably isn't used to peaceful means of solving issues. If you want war with Iran then by all means go ahead...on your own.
First refugees travelling on Hungarian bus arrive at Austrian border (Reuters)
from the article: Time for Obama to clarify U.S. policy on Iran