It’s always the privilege of the majority to consider itself invisible/neutral and all others as, well, other. As simple an experiment of asking white kids what race they are can be eye opening. Same with other categories — if gender is involved, it must be female; if sexuality is mentioned, it must be homosexuality; religion, non-Christian (I love it when Christians complain that the Jews get to take their holidays off of work — funny to point out that the only reason the Christians don’t is that they are already federal holidays…). Simply pointing out, as you do, that whiteness is a category can be an epiphany for some people.
Well-written, well-said and well done. And thank goodness those kids googling find you.