The Sage of Main Street is a raving lunatic who makes no sense at all, repeats all the old rightwing lunacy about how the Tet Offensive indicated the Vietnamese were
losing the war, and that the U.S. then was “winning.” He also seems to believe that the war was part of a deliberate conspiracy to destroy “the [U.S.] white working class.”
But the U.S. and its working class especially — now as during Vietnam War period — was and remains
multiracial. The drafted U.S. soldiers sent to Vietnam, especially the “grunts” doing the fighting in the most dangerous areas, tended disproportionally to be black and minority.
Many officers in the war were actually U.S. middle-class and upper-class “patriots” (most as brainwashed as all Americans were at its beginning). Think flight officer pilot John McCain.
It is also untrue that the deferments of college students remained in force … they were ended in 1968 (iirc), and that was one of the reasons the anti-war movement grew on campuses … just as the later ending of the draft took the wind out of the sails of the student anti-war movement.
The genuine “left” did not call drafted GIs “baby killers” but helped launch Vietnam Veterans Against the War and organized anti-war “coffeehouse” centers outside of military bases across the country. The media, especially the rightwing and pro-war media, exaggerated individual cases where nutty yippies or hippies acted stupidly to create that particular myth.
Finally, both Ho Chi Minh and General Vo Nguyen Gap did not plan and strongly opposed the Tet Offensive. They were at that time sidelined by the impatient Le Duan and Le Duc Tho in nearly all key decision-making positions.
The Tet Offensive was both a successful psychological blow that burst all the lies told by the U.S. media and generals, and also an adventurous move that cost the Vietnamese Liberation Movement dearly. The struggle went on afterwards much as before, however, with the American soldiers based in cities then more fearful and paranoid than ever.