Here’s the really funny and amusing (in a sad/pathetic sense) thing about Walter Cronkite: he did his fair share to help the US get INTO Vietnam and keep it there, prior to his abrupt about-face following Tet.
I took a class in college on the politics of the Vietnam War. Professor was a raving Lib, but HATED Cronkite ... calling him an opportunist and propagandist for the military industrial complex and someone who’s switch on the war was too little/too late.
As evidence he showed a pre-Tet news segment where Cronkite went on a bombing mission with a B-57 Canberra unit deployed to Vietnam. Uncle Walt was giddy as a frikkin’ schoolgirl climbing out of the back seat of the aircraft, gushing about how much of a rush the mission was for him ... (especially since, iirc, the pilot actually let him toggle the switch to drop the bombs).
Maybe Cronkite was catching flak on the cocktail party circuit for being too gung ho early in the war. Maybe his defeatism towards the end was a way of proving that he had “evolved”.