Every situation is unique...
but Japan in 1945 was less than 100 years removed from a feudal society. Between WWI and WWII, there were bitter fights and murders between rival factions struggling for control. There were and are definite stratifications in Japanese society as well. The point is that while Japan isn't Iraq, Bowser made it sound like a foreign government imposing a constitution was historically unprecedented. It isn't, but I think he's too blinded by his political hatred and ignorance to see it.