"However, BP corporate decisions led to the Texas City 'massacre'"

What caused your Texas City 'massacre' was a decision taken 7 years before BP even owned the refinery, a decision taken the Amoco management of the day who did not lose their jobs, and who were not replaced by BP when they took over the refinery, so the place retained its working practices and safety culture - "business as usual".

Go back and read through the coverage of the Deepwater Horizon Blow Out and count the articles where any of the other players are mentioned by name. Mind you for some it has been an education, after all at the start of this thread you have people insisting that it was BP doing the drilling.