That's not my point. This article says US intelligence has found a nuke program in Iran. Well, we heard the same thing about Iraq before we went in. Why should I believe this intelligence is any more accurate than our Iraq intelligence was? And if you're saying it doesn't matter whether there are nukes in Iran (or Iraq) - that there are other reasons to go into Iran -- then why post this article about nukes, in the first place?
So you don't believe they have a nuclear program?
Because the Iranians are devoting an inordinate amount of their resources to developing long-range ballistic missiles--which, because of relatively large CEPs, are militarily worthless unless they have nuclear warheads.
In essence, the nuclear warhead is the missing piece of the Iranian IRBM weapons system.