You might be too young to remember it but they said the same thing about North Korea.

When they actually got a nuke all it meant was that the US stopped threatening them, halted practicing manoeuvres in preparation for attack and generally just left them well alone.

Iran has probably realized by now that if they dont get a nuke the US and Israel and will keep slaughtering their schoolchildren.

Sometimes we're the brutal savages who need to be stopped, impossible though that is for some people who have more of "racial loyalty" mindset to comprehend.