to do with the speed at which independence was attained, due to pressure put on the European governments by the USA amongst others, and also to do with the fact the governments have become largely corrupt and distrustful affairs...
Europe pulled out to fast and you still find a way to blame the U.S.A. Instead of mention the constant civil rights abuses that went on down there and the medical experiments on humans (Oral polio vaccine anyone?) you just flatly blame the U.S. as bullying Europe out.
We should also forget how European colonialism helped spur on the development of radical Islam in the middle east. But hey its popular right now to blame the U.S.A. for everything, so sling it on.