Wow now, liberating people and country from an imperialist (senso-stricto) foreign country is declaring war against US??? Maybe you should start attacking Algeria, Congo, Mali, etc and give them back to their original owners?
Anyway the liberation war against french occupation (or if you prefer "civil war") stopped after an agreement which stipulated the country should reunited after national elections. However, the governement of the south (christian dictatorship oppressiv against the bouddhist minority) backed by US didn't respect the agreement and didn't held those election which led to the Vietnamese war.
https://en.wikipedia.org/wiki/Geneva_Conference_%281954%29#On_IndochinaUS then faked an attack on its own ship, to have a justification to interviene more strongly in this civil war.
https://en.wikipedia.org/wiki/Gulf_of_Tonkin_incident#Distortion_of_the_eventThe list of US intervention and influence in foreign affairs without provocation is endless. Even tho there were not always direct wars the work of the US intellegencies has been enxtremly efficient in provocking mass murder (chile, indonesia, etc).
https://en.wikipedia.org/wiki/Operation_Condor I think you perfectly know the truth but for some reasons refuse to see it, the number of evidence on US misconducts across the world is countless. There is nothing bad to realise and admit the wrong doing of your governement. The people of the united states are not responsible for their governement errors, as your democracy is far from perfect nor is it transparent. Plus, the US population has often protested against the governement actions when they were wrong.
"Those who don't learn (from) history are doomed to repeat it". You'll get fooled by your governement again and again until you realize all the times the governement has played with its citizens.