Just a quick thought: Imagine the United States was someone having a big party, and all of the other countries were invited. A BYO (Bring Your Oil) party.
BP came from Great Britain, and brought with it some party favors, just like everyone else. Only these were tainted drugs - that oil well was of a significantly inferior quality.
The United States decided to partake in BP's oil wells (the US gets paid %$ for every gallon) and suffered from an overdose.
So who do you blame? BP for the drugs (oil well)? The US for partaking? Or the US for throwing the party in the first place?
Who are the parents who get to wring their hands at the hospital, waiting to see if the US is going to pull through? Where are the police to break up this party?