They were not protected by the government
Both countries have a collective society, but Japan has an external collective culture, while South Korea has an internal collective culture. It means Japanese collectivism is more society-centered, while Korean collectivism is more family-centered. In Japan, following social standards and social order is very important. Hope you find it helpful.
It greatly changed the view of the Vietnam War back in America. People already didn't want U.S boots down on Vietnam, but the My Lai massacre made the U.S People really change views and turn on the war. This also affected the government, which then affected how the U.S commanders dictated the war.
South Carolina was the first state to secede from the union in 1960.