[azernik]

Iran signed the NPT.

The NPT did not exist at the time of the US developing nuclear weapons, and it explicitly allows US (and other pre-existing nuclear powers') weapons.

Israel, like India and Pakistan, simply never signed it, forgoing the international nuclear technology market as a consequence but also avoiding a treaty obligation not to develop them.

[t-3]

That was before the revolution. The revolutionary government still honored the deal, but that's been obviously a losing move for a while. The whole Middle East recognizes that, just look at how many countries Pakistan has sharing agreements with recently.

[azernik]

Treaty obligations do not disappear with a revolution

[t-3]

They might not disappear, but it's more like loan sharks insisting you must inherit your father's gambling debts than anything. The US and Israel have absolutely no place criticizing others for breaking agreements in any case.

[randunel]

Such as the Paris Agreement, right?

[azernik]

The Paris Agreement included an explicit clause allowing parties to exit it after giving notice of withdrawal. It did not go out of effect immediately on Trump's election, but the administration went through the legal procedure.

The NPT has much stricter terms for withdrawal, which in any case Iran has not followed.

(The better and much more relevant analogy would be the JCPOA. That's what happens when the US does foreign policy by "executive agreement" instead of treaty. Foreign countries should not value them more than the paper they're written on.)