If israel's position is "fine, everyone can have nukes because they would surely only be a deterrent" then Israel's position would not be total hypocrisy. israel is clearly not saying that; and is a proven aggressor in the region. So relying solely on who has signed agreements is not enough; especially as Israel is relying on not having signed the NPT. Israel, give up your nukes, and the world will aggressively back action against Iran. (I actually believe in this scenario Iran would willingly back down annyway, and allow inspections to prove it).
17-year-old Palestinian killed by IDF on Friday laid to rest near Ramallah (Haaretz)
from the article: IAEA will not tie Israel's nuclear program with Iran, sources say