It always has been.
I never knew that term was considered derogatory....It always has been.
Well, it always has been derogatory when speaking of all hispanics as WB's, but if it's used to reference the specific subgroup of hispanic's who are here ILLEGALLY (as it is here), then it's not, it's just discriptive.
---and the first place I heard it used was in SW New Mexico by hispanic surnamed citizens in reference to illegal border-crossers---