from the article, quoting the poll: "...Seoul should side with North Korea if the United States attacks the communist nation...
What's new here is Koreans imagining a US attack, un-related to an attack on S. Korea. That constitutes a fundamental misunderstanding of why we're there.

If that opinion were shared by a majority of the S. Korean populace, and not just 17-23 year olds, I'd say 'yes', time to quietly slip the land forces out of the place, and just maintain a strategic presence in the area.

But a wholesale, noisy redeployment out of S.Korea, especially right now with nutjob up there in the North, would encourage him to be more adventurous IMO.