I don’t like that answer. I like ...
No, they will not attack at all without using nuclear missiles. A few well place EMP are possible, but those are still nuclear missiles.
Google Sinai peninsula then call up the map. How can Israel attack Iran conventionally and actually accomplish something?
In order to be a successful mission using conventional forces, they will need the support of the U.S to leverage Iraq for their airspace for the mission, and followups.
STUXNET. SLCM. 1B1K (One bullet, One Kill.)