The media and the government is probably exaggerating the threat of a nuclear Iran. This is exactly the same kind of rhetoric the United States government used when talking about the weapons of mass destruction in Iraq. That ended up being a lie as well. And we ended up going to a war based on that lie.
These people say that they're using the nuclear stuff for peaceful purposes. Looking at the country on a map, it doesn't look like they have much choice unless they want to start putting tens of thousands of fans out in the desert somewhere.
On top of that, Iran hasn't attacked any other country in centuries, and they've showed a lot of restraint in their reactions so far. Half the world has a whole laundry list of sanctions against them, and they still haven't bothered to attack anybody or really made any threats that involved nukes.
They leaders of Iran are probably crazy, but I can also tell that they're not stupid. Even if they got hold of a nuclear weapon, they wouldn't do anything with it.
We have seen how dangerous Iran can be, under corrupt leadership, even without nukes. With Nuclear weapons, Iran would be able, and probably would seize the opportunity to, wipe the USA and Israel off of the map. Under no circumstances should they be allowed to possess this kind of weapon.
The leader of Iran, Mahmoud Ahmadinejad, has proven time and again that he is not to be trusted when it comes to transparency in his regime. It is laughable that a leader who has done so much to oppress his own people and refuse to cooperate with other world leaders calls himself a President. The title typically implies democracy, which does not seem to be what Ahmadinejad practices. There is not a doubt in my mind that he is leading Iran to stockpile nuclear weapons. In my opinion, we should be more concerned than we are.