I don't see a world ban on Iran's oil ever happening. The demand for oil is too great.
Regarding the threat of war: Even if it is proven that this plot had approval at the highest level of Iran's government (something I'm not convinced of yet) I don't see war as an appropriat
e response. The idea that you should punish thousands (probably hundreds of thousands) of innocent Iranians for the idiocy of a government that they voted out anyway but that retained power against the will of its people is absurd.
Besides there is plenty of precedent for turning a blind eye to government involvement in conspiracies. I just finished the book the Eleventh Day by Anthony Summers. He provides indisputable evidence that some people in the Saudi government helped make 9/11 happen and that the Bush administration knew about that and covered it up.
Finally, I don't agree that other sanctions won't work. They take longer and don't provide the wargasm that so many chickenhawks in the US media demand but can eventually be very effective.
Read the Article at HuffingtonPost