It is tenuous at best to suggest a causal link between the Vietnam war and everything changing at home. Apart from possibly addressing issues in the military, that period of time was already one of the most socially transformative times. From teh 50s in US and Europe, as a result of economic progression, the masses were availed educational opportunities previously reserved for the upper echolons of society. This came in the 70s for Aus by Whitkam abolishing university fees. Also, the leaps and bounds in media technology meant more people than nor had TV sets, radios and the like. Public libraries sprrang up. People were better educated and better informed, which led to more people demanding better or their vote would go to someone else. Ironically, the unpopularity (and the sad way the vets were treated) was probably a result of the rapiod rise of education and information.
Flower power, human rights, etc, were all gaining speed long before the Vietnam war even started. I would argue the Vietnam was was coincidental to most of the change you talk about. As an example, I recall in the 70s sitting in th elounge room watchin ABC 4 Corners doing a piece on NSW police corruption and my mum saying something like lucky we livein Victoria - as if the police there were virtuous. But then news came out soem time later about bent Vic police, too.