If Israel wants to take out the nuke making ability in Iran, they should. But a regime change means it will become worse than Syria, Libya with multiple factions fighting for power. Remember both Russia and China have interest in a stable Iran and if that is not the case. They will definitely start arming the rival factions that is going to fight against the US or Israel backed regime. They have access to the Caspian sea which we don't.
Also lets say that they get a new regime in Iran. Bibi specifically said Pakistan should not have nukes in 2011.
Pakistan is fighting a alleged India/Israel backed group that wants to carve out territory from both Pakistan and Iran. Only this time Bibi and Indian leadership are probably on the same page with regard to Pakistan nukes.
Currently Pakistan nuke tipped missile can reach Israel and they continue to attack India with terrorists, with India unable to retaliate heavily due Pakistan nuke threats.
Last month India and Pakistan clashed with allegedly India striking Pakistan bases that had nukes. Most if not all the countries asked them to de-escalate, except for one.
Yep, Israel which was also likely involved in supporting India with intelligence and Israel drones where used and at least some of it are manufactured in India by Israel, which cannot be attacked by Iranian missiles.
Other regions in Iran include ethnic Turks from Azerbaijan and Azerbaijan/Turkey is also responsible for Armenian genocide.
Here Iran current regime backs Christian majority Armenia, while Israel backs Azerbaijan with weapons and India backs Armenia. While Russia which is treaty bound to help Armenia is helpless because of Turkey which can block the Bosphorus strait access to Russia.
So that place is going to get hot for the next decade or so.
While we get pulled into it, we are officially going to be bankrupt by the end of this decade.