To quote Max Boot in Thursday's LA Times editorial:
Anti-Vietnam War demonstrations, by contrast, still evoke pride among many veterans of the barricades. Indeed, the graying hair and sagging bellies of many of today's protesters suggest that quite a few are 1960s stalwarts bent, like the Rolling Stones, on recapturing the lost glory of youth.
The Vietnam rallies are usually judged to have been successful because they stopped the killing of Americans in Southeast Asia. The killing of local people is another matter. The U.S. pullout led directly to the communist conquest of Saigon and Phnom Penh in 1975. The results were a human rights disaster. Tens of thousands of South Vietnamese were executed, hundreds of thousands wound up in brutal "reeducation camps" and more than a million sought to escape in leaky boats. It was even worse in Cambodia, where the Khmer Rouge slaughtered more than a million "class enemies."