Talk about "when Iran hits Israel with nuclear weapons" is hysterical rubbish.

The only people with nuclear weapons in the region (aside from the US and Russia maybe) is Israel, with an estimated 200 such weapons.

If Trump succeeds in provoking Iran to break with its established policy of refraining from developing such weapons, the purpose of any such weapons would be as a way of deterring Israel and the US from using its weapons against Iran.