Yes, partly - in an overwhelmingly white part of the country, the dumping would be happening in low-income white areas. But where the racism component starts to come in is that many of the low-income minority communities are the way they are because of a legacy of racism like redlining that kept minorities zoned into certain areas. But no, it's not as though racist rednecks are towing their cars a hundred miles just to dump them in a black neighborhood.