We are all aware of our assisting Saddam against Iran in days gone by, and then he became our enemy when he fell out of favor and attacked Kuwait. We are all aware that we helped Osama bin Laden against the Russians and gave him 135 Stinger surface to air shoulder launched missiles. Then we all know he later caused the 9-11 attack here.

Well foreign policy of Machiavellian tactics has been the norm in human civilization and it is well written throughout our species