I'm kind of fuzzy on the whole subject. I do know these facts:
Yes to the first part...no to the second.
1. The nuclear program of Iran was launched in the 1950s with the help of the United States as part of the Atoms for Peace program.
That is a stretch. The US built a toy 5 megawat reactor (enough for about 50,000 lightbulbs)

Not big enough to produce plutonium and supplied only with Uranium from the US. This reactor is no longer operational.
2. Iran ratified the Nuclear Nonproliferation Treaty in 1970, and since February 1992 has allowed the IAEA to inspect its nuclear facilities.
Sort of. Iran built secret uranium enrichement facilities (clearly against the NPT), concealed them from the IAEA, then the IAEA found out (probably from an Iranian insider). Oops.
3. Iranian officials have little confidence in the international community because of its behavior during the 1980s Iran-Iraq war.
I think that pretty much goes both ways.
So, from what I can tell, we helped Iran build it.
Nope. Absolutely not. Iran signed a contract for the
Germans to build the Busheir reactor. At the time of the Revolution, the
Germans stopped building the reactor and the
French refused to supply uranium.
Later, the Iranians contracted with the
Russians to build one of their design inside the containment dome started by the Germans. I believe that Busheir one is now operating intermittently but there is now a problem with the uranium supply as the Russians insisted they supply the uranium fuel and take all the spent fuel back to Russia as a security precaution.
They agreed to sign the treaty in 1970. They got into an argument with us (1980s Iran-Iraq war). Then we decided they couldn't have it. Gee... sounds like we rule the whole world, lol. We did that to Saddam Hussein too, didn't we? We took his side in the Iran-Iraq war but when he didn't behave the way we wanted, we handed him over to be hung?
I would say taking over an embassy and keeping the diplomatic personal hostage for more than 1 1/2 yrs is a bit more than an "argument". The French and the Germans, who were the planned suppliers to Busheir backed out. They too could see the crazy writing on the wall. Even the Russians, who walk around London putting Polonium in people's tea, have decided the mullahs are a little kooky. Real shame about Hussein, though, the good, they die young.
You know, far be it for me to decide on these issues, but I have to agree with Osama bin Laden here when it comes to U.S. involvement in the Middle East because the United States is really schizophrenic. They NEVER really help. So, let me see if I have their argument squared here. They think that because a government that no longer exists signed a treaty, the new government has to keep it? But Israel doesn't because they would never sign it? And they're America's favorite??? Hahahahahahaha! Man, do I hate my government!
The Ninth Scribe
Well, it seems you hate every US government going back 50 years, Democrat, Republican, liberal, conservative. Eisenhower, Kennedy, Nixon, Carter (he suspended all trade with Iran), certainly Reagan and most definitely Bush. In fact, you hate such a broad array of US governments, one might deduce that what you really hate is the US itself.
BTW, the whole idea of the NPT is to permit nuclear power plants in signatory nations in exchange for lifetime inspection to prevent diversion of spent fuel for weapons. That is what "Non-Prolferation" means. If every nation could simply expunge their NPT treaty obligations willy nilly then it wouldn't work very well would it?
Israel did not ask permission. Neither did Pakistan or India, BTW.