In case of Iran, the oil is not that important as "what" consequences it may bring.
Most of Arabic countries may see that move as an attempt to covnvert Islamic nations to a "modern republic". Taking that under consideration, some Arabs may suspect that U.S. (along with other countries) is about to launch the war against all the "peace-loving" Arabic nations. The consequences could have been unpredictable. A few weeks war, would clean some nations from the world map for good and forever.
I do not think that any reasonable politician would go for such outcomes as a solution.
There must be a constant political pressure on Iran - by all the countries - to give up its nuclear "ambitions", especially since the production of Iranian oil is good enough to support Iran's demands for energy.
Unless there is no choice, a military action could be taken as a solution, while U.S. should keep its military personnel to very minimal size as possible, in case of the other Arabic nations' re-actions.
"CovertOps" ? Maybe.
North Korea exists with its "Communism" as well as Cuba. Their days of glory are coming to its end. That is a matter of time.
China does not want any part of Korea. Chinese want Taiwan back within its territory.
In case those events take place, U.S. needs to watch them carefully.