This page from President Eisenhower's Memoires, Mandate for Change, page 372, shows that he believed Ho Chi Minh would have won any free election in Vietnam in 1954. This is certainly why the U.S. did not permit such an election, though the Geneva Convention of 1954 required it:
"I have never talked or corresponded with a person knowledgeable in Indochinese affairs who did not agree that had elections been held as of the time of the fighting, possibly 80 per cent of the populations would have voted for the Communist Ho Chi Minh as their leader rather than Chief of State Bao Dai."
I have known and lived with Vietnamese refugees in the United States. They are good people. If most of the Vietnamese agreed with them, we would not have lost the War in Vietnam.
We devastated Vietnam to prevent the ascension of a leader most of the Vietnamese wanted. You should have learned by our ill fated twenty year war in Afghanistan that a lot of people in the world do not want to be like the United States.