Why is Israel the only country with so called "nuclear ambiguity"?
Israel has never officially admitted to having nuclear weapons, Israel has also refused to sign the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) despite international pressure to do so, saying that would be contrary to its national security interests.
https://m.youtube.com/watch?v=MUT4fjmYIwIMordechai Vanunu leaked information regarding Israels nuclear weapons program in 1986, Vanunu was later kidnapped by the Mossad and brought back to Israel, where he was sentenced to 18 years in prison for treason and espionage.