That there is a racial angle to the New Orleans angle is undeniable. I think there probably is a racial and definitely a class angle.
It's a legitimate concern, however. Racism and racial preference still exist to this day on individual and institutional levels, that's undeniable. To suspect the complete lack of response in New Orleans could have been motivated by a racial preference is, well... I don't agree with it (I think it was more about a preference from poor folks), but I can see how somebody could conclude that, especially in the African American community.
Shrug. I don't know, the video's from 2007 and most Americans have already drawn their conclusions from the Wright story. I think it just reinforces the sides that are already planted, but what do I know. Obama does poll relatively weak with whites.