Unless I missed something I have not heard anyone say it is BP's problem. I have heard a few say it is Louisiana's problem or the Gulf Coast's problem but I believe it is almost the entire world's problem.
There are thousands of people from South Louisiana working on the problem in one way or another and I am sure many thousands more in the other Gulf states working on it.
I believe that far less than 1% of the oil has surfaced already and large amounts of it may wind up surfacing thousands of miles away years from now. No one knows the damage that will be done to the coral reefs off Florida's coast or the fishing habitats off the Atlantic coast yet. It is quite possible that effects will reach the shores of Iceland and Europe.
This could conceivably cause the extinction of some gulf species and worse yet, replace them with some others that will do irreparable harm.
This will undoubtably harm the local shrimp and fishing industries allowing foreign companies to take larger shares of the seafood market that America will not be able to retake once (if) our fishing industries recover.
This will result in less and more expensive offshore oil production with more restrictions and safety precautions which will drive up the worldwide cost of crude oil and it's byproducts. Expensive steps such as having one blow-out protector placed on top of another blow-out protector for redundancy may be taken.
The enormous cleanup effort will temporarily put more people to work while cleanup is going on then make the unemployment rolls soar when they are added to it along with all those from the coastal areas who have temporarily or permanently lost their livelihoods.
BP's stockholders surely will feel the pain from their mistakes.