No, we're not saying that it's okay. Please don't put words in our mouths (also: Iran doesn't have nukes, to the best of our knowledge).
The point: the correct answer is always nuclear disarmament. These are weapons that at best commit large-scale atrocities with long-term environmental effects, and at worst end human civilization. Maybe keep something as a deterrent, but you won't get to the goal of zero nukes by building more of them and making other countries feel as if they have to "keep up." The US has nearly 7,000 nuclear weapons as of March 2016; what's the point of having even one hundredth of that amount?