I don't know why you don't see the racism as a portrayal of casual American incidental racism. It is not (in my view) an endorsement of casual American racism.

Yes, sez me. the point was to provide my opinion.

It wasn't a humorless public service announcement, it was a bitter statement about the absurdity of American culture and the fact that the commercial itself would reflect in no way on its profitability. The PR mess will cost them nothing--at least, nothing important.