I agree with Richard that this is a "separate" topic, about the national identity (or lack thereof) of the corporation, and whether or not people's reaction indicates some sort of nationalism or bigotry.

(The fact that I do NOT completely agree with his position on the question is another matter entirely.)

This oil spill is a pretty BIG topic, and (unfortunately) will probably continue to be relevant for a very long time. I don't think that it's at all inappropriate to maintain a few "subtopics," if they're well defined.

I believe that the question of whether multinationals should ever be thought of as "belonging" to one nation or another is important, and that better understanding of the answer(s) can lead to deeper insight into a whole passel of contemporary socioeconomic and global-political issues.