Notice they blame McNamara. Not the Democrat-run Congress that voted to do to war, not the Democrat Presidents that sent the boys to war.
Or.....gasp.....dare I say it?
John and Robert Kennedy.
There's a book,
A Death in November (Ellen Hammer, 1987, Dutton), in which is described the conduct of various people, including of course the then-president of the United States and the then-attorney general, who was more culpable than his older brother.
The president of Vietnam, Ngo Dinh Diem, and his older brother, an adviser, Ngo Dinh Nhu, were actually getting somewhat discombulated by the increasing American presence in Vietnam, in both the war and communications with the bloodthirsty socialists in the north.
Diem made overtures to the north, which were quashed, specifically by Robert Kennedy. The president himself seemed indecisive, other than having a vague notion that if America was involved, America should be involved to a successful conclusion.
Robert Kennedy wanted to make it America's war, directed, operated, and manned by Americans. The then-attorney general really despised the Ngo brothers, on both a political and a personal basis, and didn't want them running this war.
Robert Kennedy won in the end; as things got more and more uncomfortable between Washington and Saigon, the Ngo brothers were ousted and shot in a
coup, and pliable Vietnamese generals began running the war the way Americans, specifically Robert Kennedy, wanted it run.
The other Robert, Robert McNamara, was just a paper-pusher; if the Rita Hayworth primitive wishes to blame anybody for the death of her decades-ago infatuation, she needs to blame Robert Kennedy, and to a lesser extent, John Kennedy.
But no, the primitives won't do this; when the facts go against what they "believe," the facts lose.