Well, Saudi Arabia for one is a valued U.S. ally and Iran's biggest rival in the region. (The semitic Arabians and indo-european Iranians do not share bonds of kin or blood as far as I know.)

There's still 80,000 U.S troops in Iraq. Were Saddam Hussein still in power there could be problems but he's not.

Plus, Iran is also surrounded by hundreds of U.S. military bases in Afghansitan, Pakistan, Turkmenistan, Qatar, Azerbaijan, Saudi, Iraq, etc..

If the U.S. even remotely dangles its toes in this conflict I don't forsee Israel having many problems on their end as far as running a few bombing missions goes.