A Unilateral Israeli Strike?

Writing at nationalinterest.org, Daniel R. DePetris asks “What about the prospect for a unilateral Israeli strike on Iran’s nuclear facilities?” How would Iran respond?

However Iran chooses to respond to an Israeli attack on its nuclear program, Khamenei will instruct the IRGC-QF to do its work as discreetly as possible. Any overt missile attack on an American ally in the Arab world let alone a conventional missile attack on Israel- would prompt the U.S. armed forces to scramble the fighter jets and deploy the aircraft carriers. This is not something Iran wants and a full U.S. military operation is certainly not something that they can afford to confront.