No, that is not true Capitalism, that is greed and bungled regulation. Capitalism is not greed, and greed is not capitalism. I am AC above you, and I fully agree in terms of government culpability. But if you want to know where the blame against Halliburton is, you must have missed the kangaroo court, Stalinist commission hearings at the outset of the whole mess, where it was like watching the Three Stooges (Oceanic, BP, and Halliburton) in front of what amounts to a show trial. Probably because so much was done wrong from the get-go that they just could not be sure whose process failed and who would be ultimately responsible.
And to which treaty to you refer? If its the Kyoto Accord, the US has not gone with that because it allows exemptions for developing industrial countries, like China, and puts draconian restrictions on third-world countries essentially ensuring that they never develop.
Then there are the boycotts. How utterly stupid. First, BP will need the money to pay for the clean up and damage claims, as it is already beginning to liquidate assets of its North American operations. Secondly, the boycotts really only harm the local business owners. Lastly, if you are going to boycott BP on principal for the leak, then you should also check out the Niger Delta and ExxonMobile, and while you are at it why not boycott Citgo for being owned by a dictatorial regime which uses fear and intimidation, if not flat-out strong-armed tactics, to silence its critics.