Iran's ancestors, the Persians, developed the game we now call chess, a game build around deceit, strategy, and snipe hunts.
Iran is building a nuclear capability. That is not mean Iran does not have nuclear weapons. Matter of fact, I can't think of a better way of deceiving the west than by drawing attention to the development of home grown weapons all the while having secured operational soviet era nukes. I don't think Israel has been suckered. Not too sure about the US. It wouldn't be the first time the US grossly underestimated an enemy's capability.