That's stupid.
If the American government wanted oil why attack Iraq? Iran has three times the amount of oil reserves, and most of the world hates Iran anyway. We'd not only get our oil, but look like the hero while doing it.
The American Government is not nearly as brilliant and diabolical as you seem to think it is. (Or want it to be)
And if they were so brutal why don't they just release biohazardous matireals? Infect the whole damn country with the plague, then go in there and take the oil with special protective suits.
Or hell, i'm impatient and impulsive, just get a bunchof guys, a wheelbarrel, and just take the damn oil, then nuke them when you're done.
None of these have happend. So apparently either the government is beyond human intelligence, i'm just a barbarian, or all of what you say is bullcrap.