The Vietnamese people did a while ago, and so did a number of American soldiers who actually fought in the war. Most of the folks still trying to see a conflict are people influenced by propaganda war movies and have never been to Vietnam where people were open to people from all over the world and that includes Americans, and where American ex-soldiers returned to heal their souls and to help to make good on what they did.
E.g. American veterans from the war raised money when the American government still pretended they did nothing wrong in the war and they help in cleaning up e.g. minefields the Americans left behind and that endanger especially children.
And also, the US government already reconciled with Vietnam and it actively helping in matters of China. Japan also have their eyes on it.