Conceivably a compact tac nuke could make it to Israel, but any nuke detonated in Israel would guarantee incineration of every Iranian population center- so what advantage would a working and deliverable nuke give any ME country?
As we saw in Iraq, the stated possibility of WMD served as a handy pretext for the US to attack.
I heard today on CBC Cross Country Checkup an academic assert that Netanyahu attacked Iran to deflect attention from the plight of starving Gazans shot daily while lined up for food - a much higher toll than suffered by Israelis under Iranian bombardment.