Israel's interests don't trump the rest of the worlds - particularly since Israel is a nuclear power that has refused to sign the NPT.
Sure, but when Iran threatens to wipe you from the face of the Earth, it won't matter who has second strike capability and who doesn't. One nuke ends Israel forever. It won't matter who signed the NPT. Israel will get the blunt end of this deal.
If it comes to that - everyone will get the blunt end of the deal because Israel will strike back and then everyone will go nuts.
But Iran is not insane. It wants to be a major regional player but it does not want to destroy itself.
What people don't seem to grasp is that there will be no Isreal if Iran nukes them. Israel won't be there to strike back.
The largest uranium fission bomb (the only sort of nuclear weapon possible for Iran to build) ever built had a destructive radius of less than 5 miles.
Where are you getting your information from?
From this, the detonation of Tsar Bomba. The blast wave (in this case), not the explosion itself caused the most damage. If you juxtapose the blast zone from Tsar Bomba onto Paris, the airburst would destroy everything within a 35 kilometer (21 mile) radius:
Now scale it down to a Variable Yield (Boosted) Uranium Fission Warhead, which can exceed the yield of a conventional Uranium Fission warheads, the highest yield as of now is 800 kilotons in the
eastern hemisphere (The US B83 is a variable yield 1.2 megatons, most powerful in the Western Hemisphere).
If for example it was surface detonated over Tel Aviv:
Fireball radius: 1.1 km = .68 miles
Air blast radius (20 psi) 1.98 km = 1.2 miles
Radiation radius (500 rem): 2.43 km = 2.4 miles
Air blast radius (5 psi): 4.25 km = 2.6 miles
Thermal radiation radius (3rd degree burns): 9.7 km = 6.0 miles
Death toll would exceed 529,000*, with 420,000* injuries. It would expose nearly 1/3rd of Israel to lethal or debilitating doses of radiation given a south southwest headwind blowing at 9 mph.
Now, Jerusalem with the same measurements:
585,000* dead with 390,000* injured. It would also expose at least 1/3rd of Israel to lethal or debilitating of doses of radiation given a southeast headwind of 9 mph.
The "destructive" radius is irrelevant. Two detonations in those respective locations would kill 1,020,000* people at once simultaneously (over 3 times more than final running tally of the bombs detonated in Hiroshima and Nagasaki ending in 1950, and it took
9 years for that many to die) and 820,000* would be injured in that instant. That is 10 times as much as were killed in Hiroshima and Nagasaki combined.
*=Numbers will vary on exact placement of the strike
Calculations derived from
NUKEMAP by Alex Wellerstein