Why did the American people think the Korean War was a mistake and did not support it?

There is no way to know with certainty, but I do not think it was appropriate for the United States to intervene. If people in South Korea wanted to leave, we should ... And a majority of Americans (65%) had an unfavorable view of North ... Public Support for the War ... with half of Americans saying the war was not a mistake, while a low of 36% said it was a mistake