They have sufficient nuclear delivery systems for any forseeable need in the middle east theatre.

They sure did a number on Syria a few months ago with conventional weapons.

The would prefer that the US take any necessary pre-emptive action because the arab world might not sit still for an Isreali strike on Iran. The arabs are kind of used to getting spanked by the US by now

They might not have the specialized deep-penetrating conventional weapons needed to get at deeply buried facilities...but tactical nukes would probably do the job if it came to that.