I'm white and I call things white as an insult when they offend me for cultural reasons. There are some behaviors I associate with white people that are unpalatable to me, and I call them out, when I might avoid the cultural call-out to other cultures because a) they are relatively more oppressed than my (white) culture and b) I do not see the interior of that culture all day every day, as an outsider to it; I decline to arrogate myself that way.