What was the Vietnamese point of view in the Vietnam War?

For reasons unknown, even though North Vietnam and the Soviet Union and Red China stated they were communists, and stated their intent on taking over the Free Republic of South Vietnam, SOME US citizens still believed the war in Vietnam to be a CIVIL WAR, in which communism was not an issue. Another perspective from US citizens, was that the communists were trying to take over South Vietnam, and had to be stopped.