Plainly the attack by US politicians on British Petroleum (of London) is because it is not a US company.

It's only plain to you. There's nothing in what Obama said that has anything to do with nationalism. As everybody else but you has said, if it has been Shell or Exxon or Texaco, the stink would still smell the same and Obama would have said the exact same thing. You've got a bee in your bonnet and it's making your brain misfire.