Irrespective of Israel’s policies and existence, Iran’s pursuit of mega-capability (nuclear) aims at removing the mega-obstacle (the US power projection), which would enable the Ayatollahs to attain their mega-goal: the domination of the Persian Gulf as a prelude to the domination of the Muslim World and then the entire globe.
Moreover, the Ayatollahs’ track record (e.g., sacrificing 500,000 of its own youth on the altar of clearing minefields during the 1980-88 war against Iraq) suggests that a nuclear, apocalyptic Iran would not be contained, while tolerating Iran as a threshold nuclear power could trigger a nuclear world war. (Read More).