Why do Brits here get so riled up when someone refers to BP as British Petroleum?

I don't get it. One would think that when someone refers to BP as British Petroleum, the Brits here take it as an attack on their national pride. Are the Brits ashamed of BP? Just because British Petroleum changed the name of the company to BP does not make it any less a British company, no more than Kentucky Fried Chicken changing its name to KFC makes it any less a "fried" chicken company. Or is it that the Brits here have an axe to grind with BP? Are the Brits here upset because British Petroleum changed its name to BP in order to change its image from a "British" company to a multi-national company? Is that it? Is it that the Brits here feel that the name change is a betrayal of the British national pride? I just don't get it why the Brits here get so riled up when someone refers to BP as British Petroleum. BP is a multi-national company but, after all, its world headquarters is still in London and that still makes it a "British" company. That is at least for now. The plunge in the BP stock price makes it takeover bait! BP could be acquired by one of the big American oil companies. Now wouldn't that be a kick in the British backside?