Why is it only the white guy who hands out presents?

There's been a lot of flap the past few days over whether or not Santa is white. This, to me sums up the argument (whether it was originally intended as a jest, or not).

“If we cannot imagine you as racially different from ourselves, it’s because our minds are stunted by a history that still can’t fathom benevolence, and kindness, and intimacy in the bodies of those who are not like us. If we still doubt that you can embody every possibility of racial being, it is because we do not yet believe that every racial body is capable of making our sugar plum dreams come true.” ~Melissa Harris-Perry in her Letter to Santa