If we merely wanted "black gold" we would have invaded Mexico...much closer to home.
And overthrown Chavez rather than Saddam - we get more oil from Mexico and Venezuela than from the Middle East.
Even trade. For their black gold, they get our greenbacks. Then they play in our Stock Market to make themselves more greenbacks. Then they spend their greenbacks on lead and gunpowder to kill the very people who bought the black gold from them for our greenbacks. Funny, they hate us so, but they play in our stock market. Strange people.