There's no such thing as jerk rice apart from what Jamie Oliver has concocted. That's her point. Anybody from any nationality can eat anything they want, there are just some dishes that are best left alone and enjoyed how they're supposed to be made.
What a complete Pratt Dawn Butler is. Accusing Jamie Oliver of cultural appropriation because he is selling “jerk rice”! Disgusting excuse of a human. No mention of Ansley Harriott selling risotto though is there? Or many nationalities selling fish and chips? Thought not. Dick.
People were just pointing out that it's a traditional marinade for meat, and that 'jerk rice' doesn't actually have anything to do with the authentic traditional cuisine. He's just made it up. People are then rolling their eyes at him marketing it as such