I think I get what SuperBanana was trying to say.
Already-racist and awful girl puts on a face mask. Looks in the mirror and thinks in her own fucked up mind "lol I look like a black person, I should share this." Posts about it, gets everything she deserves.
This particular situation has played out several times partly because face masks are a thing. Some people instead of just thinking "hah I look silly" go to racist thoughts instead, because they are racist. At no point in the process is it a non-racist or non-terrible thing, but the idea is that they're not putting on the mask in order to make the statement, they're looking in the mirror and suddenly realizing they could make this statement. Of course that's no excuse and doesn't lessen it in any way, but it is an explanation as to why it keeps happening with girls putting on beauty masks.
Like if hockey masks were black you would see similar things happening with guys.