The media actually did support Vietnam till Tet...Howard K Smith lost a son there I think...or it may have been Severied(?)
even after Tet, all the anchors did not follow Walter
the media was not nearly as overtly in the lefty tank like today and they openly scorned the counter culture..
Hollywood had lefties yes but it still had patriots then too and the patriots were big box office
What you say makes sense, since my earliest memories of TV and other mass media — Quisp vs. Quake, the Apollo moon landings, etc. — begin soon after 1968.
Don’t remember enough/haven’t read enough to disentangle which news anchors/editorial pages were on what side. I have a clearer recollection of the post-1975 war protestor gloating over the fall of South Vietnam.