When I see other people make posts- like most made by people on here - that are straight out of the Trump political campaign's talking points, sometimes I will respond and point out the Dear Leader cult worship.
In August 1965, Gallup reported that 60% of Americans supported the war effort. By January 1967, it was 52% and declined further each year after. Nothing really stunning about those numbers. The numbers for the Iraq war effort, Afghanistan effort and many others often start out high, then dwindle as fatigue and reality set in.
Plenty of people, including Johnson were responsible.
I didn't look too hard but Gallup said in a poll taken in January 2018 that 69% of Democrats polled said we should have stayed out of Vietnam. Only 38% of Republicans said we should have stayed out.
I even know Richard Nixon tried to ruin the peace talks in his Presidential campaign in 1968 and extend the war, with more Americans dying.
"In one series of scribbles, H.R. Haldeman reported Henry Kissinger’s willingness to inform on his U.S. diplomatic colleagues, and keep Nixon updated on President Lyndon Johnson’s furious, eleventh-hour efforts to end the Vietnam War.
In late October 1968, the two men connected on what came to be known as “the Chennault Affair.” Nixon gave Haldeman his orders: Find ways to sabotage Johnson’s plans to stage productive peace talks, so that a frustrated American electorate would turn to the Republicans as their only hope to end the war."
Given the failed talks, aided by Nixon, one young man from my home county was a victim to that effort. He died in April 1969 of a gunshot to the stomach in Gia Dinh. He was 21. Per my father who was friends with him, he didn't think he had ever been out of our own county before he went to Vietnam.
A good read about Nixon's effort to sabotage the peace talks and extend the war