Israel already has about 600 nukes.
Turkey as a NATO member has nukes in their country to store and use at will.
Pakistan also has nukes.
It’s not gonna make any difference if Iran obtains nukes. There’s nobody they can use it against without being hit back. Low yield tactical is used for first strike for offensive conventional engagements .
Retaliation strikes are for annihilation .
Demography is the real atom bomb in this scenario.