Our mistake in this forum is that we look at the Iranian position from everyone's point of view except Iran's.
We can state as a total fact that Iran has already made a large commitment to develop and use nuclear power for electrical power generation. A right every nation has under the UN charter.
At some future date, Iran will hit that fork in the road decision point, to stop at mere nuclear powered electrical power generation or go to have have both nuclear energy electrical power generation and also nuclear weapons.
When that decision point is reached, then Iran will have to look at the international threat level facing Iran. If Israel is still led by the same crazy settler parties and the US has not rejected zanies like Dick Cheney, equally zany neocons, and GWB type thinking, we can understand why Iran may opt to refine its spent fuel rods to extract out the plutonium needed to produce nuclear weapons.
If on the other hand, its possible that Iran and the USA may form an alliance based on mutual interests, then work with Iran to develop a Iranian financed pipeline to India, thus allowing Iran to sell its huge natural gas reserves with the resulting employment being more than enough to solve our current Afghan problems.
And if that latter possibility results, Iran may well opt not to go on to develop nuclear weapons.
We also have to look at recent Iranian history, when Iraq damn near conquered Iran, and Iran could not purchase the weapons needed to defend itself. And the cliques of Rumsfeld and Cheney openly sided with Iraq. And Iran still has to listen to many in the international community who advocate bombing Iran.
If you were running Iran, you would probably want nukes to purchase that immunity from foreign conquest, if the foreign conquest threat level does not reduce.
But all in all, The Israeli fear mongering version of the Iranian nuclear program is utter bullshit. Because Israeli claims the Iranian intention is to produce enough 95% pure U235 to produce Uranium based bombs, and once Iran has a few such bombs, they will peg them immediately straight at Israel. Knowing full well it would be national suicide, because Israel already has 80+ plutonium based bombs it would be fully justified on using to retaliate against Iran. Add in the fact that Uranium ultra refinement is the slow route to nukes, and we can then conclude Iran would never have more nukes than Israel. Add in another fact, if Iran so hated Israel to the exclusion of all rationality, they have enough stockpiled chemical weapons to severely damage if not exterminate Israel right now, and the missiles to deliver them. And if so, Iran should use their chemical weapons now, before Israel can complete their anti-missile defenses, if we are to believe the Israeli Iran is bat shit crazy bullshit reasoning.
The other thing to point out the Mullah's days may be numbered in Iran, they are now acting like the Shah who got the ole heave ho, and their hold on internal Iranian power is tenuous at best. And if the Mullah's go the way of the dodo, Iran will still be committed to the peace time use of nuclear energy.