The Korean War was a UN Police action, many nations involved, it was not a war between the U.S. and Korea. As such that may be the reason the caskets are draped with the UN flag.
You’re exactly right!
People are too ready to look for reasons to be made at the UN. There are plenty of reasons to view the UN negatively but this isn’t one of them.
The UN flag is appropriate and once remains are identified, they will be draped in the American flag.
Can’t believe this is an issue.