When the United States needed new territory in the 19th Century, it conquered the Native American Aborigines (the Indians). They were death marched to reservations in the deserts or to other wasteland to make room for whites. Just look at Arizona. The whites took Flagstaff and "gave" the luckless Indians Tuba City. Visit both places so you will see the truth for yourselves.
Carrying over the same logic, we need oil, so we'll take what we want and throw the natives out. Knocking over Saudi Arabia is the easiest. They have no army to speak about, power is concentrated in a few and their population is small. We confiscate their oil fields and the gas crisis is over. As for the Saudis, deport them to Iraq where they'll be finished off in short order.
Feeling guilty? Why? We've done it before and can and will do it again. It's nothing more than survival of the fittest.