As far as the free flow of oil...our economy is not the only one affected by restraints on oil supply. As you pointed out, it is a global market, but it is also a global economy. If the rest of the world slips into recession, and possibly even depression if the free flow of oil is interrupted, only the arrogant and ignorant would believe that that economic turmoil will not reach our shores, of course followed not to distantly by global political instability.
Even if we didn't get one drop of oil from the Persian gulf, it is in our interests to make sure that others who need it can. Petroleum is the life blood of the world economy...always has been, and will be for the foreseeable future.
BTW, we have more oil reserves domestically than we could use for hundreds of years, and those reserves only increase the more we look. I'm not worried about using our own oil first.
IF it is in the world’s interest, then why not have the world contribute to it, instead of running up TRILLIONS of dollars in debt and devaluing the dollar?