Maybe for some people, the point is to clean up the mess. To them, assignment of blame is less important than aversion of disaster. I'm not sure if I subscribe to that view myself, but I can certainly sympathize with it.
It's not about blame so much as the fact that with BP on the hook for the bill, money isn't the thing that's in need.
You know what will be a million times better than sending clean-up money? When the clean-up is done, book a vacation and go patronize the tourism spots that are currently deserted.