there’s something so sinister about spreading misinformation like this. 1) 당신 is NOT the most common form of you in korean and when you are learning korean as a non-native speaker they tell you not to use this at all. 2) that lyric says “you can’t do this to me” 3) 언돼 does not mean black people it means “you can’t” or “you mustn’t”. I hope this is ai propaganda and not a real person spreading this for fun.