This thread. If you've watched reply 1988, the hair of the ajummas was a symbol for that era. It was not directed to offend a particular race and they stated it directly on the subs who hyunjin is portraying. https://twitter.com/cherrywooo/status/1278386946880897024

I'm sure that the character he portrayed was based off of that era since the cartoon was ages ago.

I just hope mnet did not make that as a thumbnail since it can be easily misunderstood without a visual representation of who he was portraying.

this thread is in no way trying to enable racism. i'm a person of color and i understand that there are people who got offended. i'm also doing my part sending out emails to take proper actions.