During the 60’s, the press was overwhelmingly pro Vietnam War. My Lai changed everything.
I don’t know what news to which you were exposed, but the My Lai incident didn’t come to public knowledge until a year and half (November, 1969) after Cronkite’s lies and the rest of the press’s echoeing chorus. In the northeast editorial pages were filled with experts espousing how the Dominoe Effect didn’t hold water and that we were wasting lives because of it (ask Cambodia, Laos, and Burma that worked out for them). Yes, we wasted lives but it was because we let politicians and journalists dictate ROE.
The news papers and networks gave huge coverage to anti-war protests starting in 1965 (bringing the cameras in close to make it look like even small gatherings were immense) giving little coverage to the successes in VietNam (yes, there were some).