The Israeli consensus on this kind of thing is built differently than here, so it will take a while to get going on it.
Part of the problem with dealing with Israel is that they have very little trust for anybody. Zionism started with the Dreyfus case, and those Jews who survived the last world war had very good reason to be suspicious. So the national historical narrative is that "we can't trust anyone, we have to go alone, because when push comes to shove, in the past, even out best friends have deserted us." That is the belief that flows through all the parties there. Even the most pacifistic.
And Iran is run by nut job who blame Israel for Iran's internal problems.

If he had the opportunity and the means, he would do Israel sever damage in a heartbeat.
The next question, is does he have the means. Well, the Iranians don't approve of Jewish science.

I kind of doubt that they could build a functional device, given their doctrinal silliness. But, if I lived under the narrative of the state of Israel, and I saw the Iranians at work on something scary, I would respond in vigorous manner.
And if the US doesn't approve. Well, tough. the PM can send the president a card and some flowers and a unctuous apology after it is over, but the PM will see to it that Israel will survive.