It would be easy for two bombs to devastate a small country.
I would expect Jerusalem would be off limits go Iran because the pails want it for a Capitol.
However, the Israelis would most likely destroy 2-3 Iranian cities. The us may even try to stop them if the hero of Benghazi, peace be unto him, is still in office.
They might even tell the Saudis that if they get nuked, they’ll open up a can of sunshine on Mecca and Medina on their way out, and there won’t be any more “pilgrimage” for a few long, long time.