Its actually quite weird. Israel, France, the UK, and the USA all saying Iran cannot have nuclear weapons while all having nuclear weapons themselves (and the USA having used it on two civilian populations).
So the US also signed the NPT where all the nuclear states also pledged to eliminate their arsenals... But we built a few more in '07. We also didn't sign the '17 treaty on prohibiting nuclear weapons.
Only one nation has ever demonstrated and itchy trigger finger when it comes to these weapons.
Maybe you could make a case that having these weapons would make them more hostile/expansionist/aggressive. It certainly has merit considering what the US has been up to since 1945.
https://en.wikipedia.org/wiki/Treaty_on_the_Non-Proliferatio...