If any of these stupid nonwhites are diagnosed with cancer, the oncologists should flatly tell them that they cannot receive any kind of treatments because that would constitute cultural apropriation.
Force these people to face up to the consequences of their ideas.
If we were the evil monsters they make us out to be, we'd do exactly that. In fact, we'd show up at their homes, and take away their cars, air conditioners, furnaces, refrigerators, freezers, televisions, computers, stereos, synthetic-fiber carpets, synthetic fiber clothes, asphalt shingles, finished lumber, linoleum, stainless steel, any other kind of steel, particle board, plywood, tyvek, float glass, cast glass, beer, wine, liquor, ...
Cultural appropriation, after all, is wrong.