well I got this from the internet : In hindsight, the Vietnam War is generally regarded as a mistake, but during the 1960s, the war was popular. Those who opposed the war, such as hippies, were loathed by mainstream society as Communist sympathizers. ... That changed after the war, which also made our social inequities more visible.
Those who opposed the war, such as hippies, were loathed by mainstream society as Communist sympathizers. This resentment was so strong that when four college students were killed by the National Guard at Kent State University in 1970, fifty-six percent of Americans believed that the killings were justified.
A policy adopted by US in the cold war, it was aimed at containing the influence of Soviet Union and communism around the globe. Because they were seeing soviet's expanding influence as a challenge to their hegemony. US used various strategies to contain it varying from creating a buffer for Soviet, and taking major states of the world under confidence
