First, I'm pretty sure Israel doesn't have a space delivery vehicle. If that's the case, they can't do an EMP burst.
An Electro Magnetic Pulse is created by any nuclear detonation, but it is greatly magnified when the burst is in the earth's ionosphere. And when I say greatly, I mean it can affect an area 10,000 miles in diameter! The author said this can be altered by the altitude of the detonation. Maybe that's true. I don't know. The ionosphere is ~85km to 600 km above the earth, so maybe.
My understanding is that there really is no fallout from a high altitude burst. Fallout is really a product of radioactively charged dust falling back down on the surface. A high-altitude burst doesn't have this.
You can harden electrical components from EMPs. Even if Iran's nuclear powerplant(s) wasn't hardened, you still only need to replace the electronics. I don't know how difficult this would be to do, but I can tell you it would be a lot easier than smothering it with some bombs.
The amount of civilian suffering would be out of control ... devastating. Not to mention it would likely fry the bordering countries (including the coalition forces in Afghanistan) and the international world would be furious. (As if they don't have enough enemies) Israel would never do this.
Athletics Department Mission Statement:
Our mission is to build a distinctive, exceptional athletic program that is fully aligned with the mission and values of Brigham Young University and The Church of Jesus Christ of Latter-day Saints.