The oil motive doesn't seem realistic in that we already have within our own borders enough oil to last the world at least a couple of centuries . . . and that doesn't include the availabilities of the northern territories of the continent.
Nope, I'd just sweep the whole shebang out of the U.S. for failing to assimilate, they hoping instead to convert us by hook, crook, or beheading to their primitive sexually motivated political system.