There are a lot of gray relations out there, but there’s almost no way you could morph the current US/SK relations to one of hostility; beyond a negligible minority of citizens in either being super vocal for some perceived slights.
You think when ICE arrested over 300 South Korean citizens who were setting up a Georgia Hyundai plant and subjected them to alleged human rights abuses, it was only a perceived slight?
'The raid "will do lasting damage to America's credibility," John Delury, a senior fellow at the Asia Society think tank, told Bloomberg. "How can a government that treats Koreans this way be relied upon as an 'ironclad' ally in a crisis?"'
Trump will find a way, just as he did with Canada for example (i mean, Canada of all places). Things are way more in flux than they used to be. There’s no stability anymore.