This one is where ICE’s operation is completely fair. Koreans have systemically abused ESTA on a massive scale for a long time. Korean companies treat ESTA as the de-facto business visa. US Homeland Security did tighten up the screening last year because of that, but the Korean government chose to do absolute nothing about it. No mention of ESTA & VISA issues was made during the recent US-SK summit meeting. Something like this was bound to happen sooner or later.

And I say all this as a Korean. This article is politically biased rather severely.