The money is not going only to blacks; they were not the only people affected, they were just simply the group that the media loves to focus on, because the press somehow saw it as a way of "getting" GWB. This is why he is focusing on them, in addition, perhaps, to the hope that some of them will take advantage of this opportunity to get their lives together and escape the Dem plantation.
But the Gulf Opportunity Zone will include all of the counties in that zone, not all of which are majority black (like NO), but all of which were devastated. There's a lot of unemployed poor white folk down there who will benefit by this, too, but the press won't care about them.
It may very well be that many of these folks will eventually be better off than before the storm--a sort of blessing in disguise. Sometimes it takes a hurricane to get people out of the hell-hole they've been living in.