> U.S. foreign policy didn't have to punish Japan for it's Manchurian expansion, but it resulted in Pearl Harbor. Japan absolutely completely had to be destroyed brick by brick for that nation to yield. No Japanese terrorists since. Other incidences of unprovoked and unchallenged acts: see Crimea and Nazi annexations.

That's an insane conclusion. There have been plenty of border skirmishes that haven't resulted in greater aggression. Those are cherry picked data points.