Iran and nukes!

As I am sure you all have heard, and will be hearing quite more, there is a lot of pressure on Iran to show that it's nuclear program is peaceful and not for making nuclear bombs. I am definitely against Iran having any nuclear program at all, peaceful or none peaceful. The reason being that even for peaceful programs are very expensive, and I think considering the fact that Iran has so many other energy resources, for instance natural gas and oil, I don't think it would be worth having the nuclear program. Now thats my belief. I also believe Iran's government is indeed after nuclear weapons. But I think if I was at their position, I would do the same. The reason is that once you have nuclear bombs, no matter how weak your whole army is, countries like US would think twice, or three times about attacking you. So, of course you would not go ahead and use the bombs for offensive purposes, but rather for defensive purposes, the last resort if you will. Also, it is quite unfair and ridiculous how the International Atomic Energy Agency ignores Israel so easily and yet puts pressure on countries like Iran. But hey, it is a sad and unfair world we live in!
Having said that all, I am actually ok with putting pressure on current Iran's government as I think it would help Iranians to change the current dictatorship and reach a true democratic government. So you see, the situation is quite complicated. I guess once the current power structure is changed in Iran, I am in full support of having nuclear weapons for "defensive" purposes only. But once all countries, including US and Israel give up their nuclear bombs, of course I would be a full supporter of Iran not having nuclear bombs. As simple as that!! Any comments?