Nukes are a weapon of terror and Iran is immune to terror bombings. They serve no tactical value, their only value is in genocide. They are a paper tiger.

A nuke can’t open the strait or win the war. If usrael knew where the Iranian bases that control the strait are they would just use conventional bombs on them. Iran’s bases are buried deep enough to be immune to bunker busters and while nukes are devastating area weapons their penetration is limited. In order to get lucky and hope at destroying most of the bases that close the strait with nukes they would have to use enough to irradiate the whole gulf region rendering the opening of the strait useless because nobody will be there to pump oil, while also harming their allies with fallout.

If usrael use nukes against civilian centers in Iran (the only “useful” application) , Russia and China have no reason to expect the same would not be done by to them. Given the ongoing war in ukraine and the threats to China over flagging american supremacy the logical response would be to nuke usa before it nukes them.