So you think Israel would commit suicide by nuking Iran? I think this falls under MAD even if Iran doesn't have a nuclear weapon.
There are more then one type of bombs, and I never said nukes.
Iran is an extensional threat to Israel. They have for decades stated they want Israel destroyed and have shown no reason not to be taken seriously. And, unlike us in North America, Israel does not have the luxury of two expansive oceans keeping enemies away, which was proven in 1948, 1967, 1973, and so on and so on.
So they tend to take actions from enemies a little more serious then us. We have no right criticizing them for it while living with the luxury of peace and no wars in our country for over a century.
Iran is now becoming an extensional threat to other Arab nations too, like Saudi Arabia, Jordan, Irac, etc.
By making Iran stronger and taking away the sanctions, this will only increase the threat. On top of that, we have no guarantee Iran will follow the deal since they will not allow inspectors onto the bases where we suspect the enrichment to be happening. Israel is not stupid; they are not going to except this.