They were the only one who used the term. They might’ve been calling someone else out, but they did it using racist terminology that no one else was using. In doing so they sacrificed the high ground they’re attempting to lord over from.
When I first saw a hexbear user say it, it took me a moment to figure out what they meant. I was like “oh yeah, yellow was a racist way of referring to Asian people, from like 50 years ago”. Way to keep racism alive, congratulations.