I think if we compare the history of the relationship between America and Saudi Arabia (also a desert with catastropic demographics, but a rather different economic outcome) vs. that between France and its African colonies (or Britain and its India colony), we can see that European colonialism was actually a bit worse in outcome for its partners than what's known as American imperialism (which still has major problems, but not as bad as what Europe got up to).

Your comparison is flawed and oversimplistic. You might as well consider the US as a former British colony and consider that British colonialism faired quite well.