You are expecting everyone to be as aware of these issues as you are. I don't think white supremacy has as large of a share of the mindspace in south korea as you think - not every issue (even if it has a wikipedia page!) is burned into everyone's mind across the globe. But I am happy to hear that every time you pick a username, you make sure it is free of dog whistles in all cultures and that the letters and numbers cannot be picked out or rearranged in a way that hints at one.
