The biggest global risk in this case would be that tactical nukes would be back on the menu which would immediately change the face of modern warfare.
OK, they never signed up to it, but still.
Trusting the US or any agreement with it would be foolish.
https://www.politico.com/news/2024/11/08/donald-trump-iran-a...
Ted Cruz can blather whatever he wants (and he also footnoted it to say it was only HIS belief), but only Iran has holy-text justification for the destruction of all Jews, mentioned numerous times in authenticated Hadiths (just search them for "The last hour will not come")
So, with that being said - which nuclear-obsessive theocracy do you support?