I can't say this surprises me, an Administration that wants to rebrand GWOT to something without the word "War" in it, wants to call terrorism "Manmade disasters," and thinks GITMO should be closed because Obama the Legal Genius can take care of all those little problem actors in US courts donchaknow, would clearly have no stomach for taking a showdown with Iran to the hard edge.
The Israeli response is much more problematic. It's a far tougher problem than the Iraqi reactor at Osirak, much farther and not as concentrated, already full of radioactive material, and on the other side of an active war zone full of airspace that is crawling with sensors, and it would involve flying for several hours over territory full of people with cell phones and no great love for anything with a Magen David painted on it. Would they resort to ballistic weapons, and if so carrying what kind of package? We shall see.