In fact, the real issue isn’t whether Iran gets close to a bomb; the real issue is the long-term balance of power in the Persian Gulf and Middle East. Iran has far more power potential than any of the other states in the region: a larger population, a fairly sophisticated and well-educated middle class, some good universities, and abundant oil and gas to boost economic growth (if used wisely). If Iran ever escapes the shackles of international sanctions and puts some competent people in charge of its economy, it’s going to loom much larger in regional affairs over time. That prospect is what really lies behind the Israeli and Saudi concerns about the nuclear deal. Israel and Saudi Arabia don’t think Iran is going to get up one day and start lobbing warheads at its neighbors, and they probably don’t even believe that Iran would ever try the pointless act of nuclear blackmail. No, they’re just worried that a powerful Iran would over time exert greater influence in the region, in all the ways that major powers do. From the perspective of Tel Aviv and Riyadh, the goal is to try to keep Iran in a box for as long as possible — isolated, friendless, and artificially weakened.