It is just the color of a Devil. Red, Black, Blue, White, or green. Devils don't have rights because they are monsters. Maybe if controls air so it's color is white. He just wants to kill a wind element demon.
Racism shouldn't be searched if something is racist then it is but if you have to really dig in the lines then it's just not worth it. Ser_Reggin I don't even think is racist because to see it you have to search for it. Is Grisgen racist? has the same letters in it so clearly the person who made it wanted to hurt peoples feelings. Unless the person makes it obviously clear to everyone he is being racist then just let these things go.
But if he is trying to hurt people then he should be harshly punished.