It was a ten year plan, not a permanent plan.
You are suggesting that these people change their entire identity to suit your notion that the world should be peaceful. Would you suggest that a metalhead not wear leather because you don't like loud music? Would you suggest that a gay man "be normal" because "God doesn't like gays"? Identity is not something you change in other people. Unless you're some colonial conquerer forcing your culture on others.
By any rational, third-party standard, such a country should not have nuclear weapons.
But it also wasn't not to have the capacity to target the US; if France implicitly trusted the US they wouldn't have opted out of the NATO unified military command for 43 years as well as developing their own nuclear deterrent.
> only Israel was threatened by Iran
...by demonstrating that other nations are in fact under threat. Threat is defined not only by "what Iran wants" but also "what Iran is capable of".