It must be quite obvious to all of us (western world) that we desire control of the worlds oil supply. As someone said earlier, whoever does that has the world by the nuts. Just as some countries like Saudi, Kuwait, Dubai etc want control of the banks and tourism etc. The thing is, some leaders have seen fit to gain this control with force under the guise of human rights. Not saying there weren't genuine HR needs to address. But read a bit deeper about Husseins regime and you will see he was doing plenty too increase welfare, like the worlds largest water movement system to irrigate lands and all that goes with it. So off to war they go, and remember, in the long run, war is good for a country, just witness modern Germany.
Anyway, if Obama was a stronger/madder president then the west would be invading Iran right now. Just as well he isnt and neither is Cameron. I wouldn't fancy stirring up the hornets nest that is Russia and China and probably N.Korea either.
I dont think we have the right to deny Iran whatever technology they want, hell why should all the major players in the west have it and not them? I do think we have have the right to stop them using nukes at all costs. Just like your guns people.