You bring up many good points. But one I feel you overlooked was unequal treatment of traditions. Everyone wants to share their culture. As a black man, I love hearing about how other people do things and showing them I do them. I’m particularly drop to Japanese pop culture and history. But, I get really upset when people say things like “Miley Cyrus invented twerking.”
It hurts more when I see white people twerking for fun and being able to start twerk exercise classes while black people are ridiculed for it still and Jamaicans are still called gross and trashy for dancehall dancing.
And, here’s a thought from an American perspective, so it may differ from the opinions and experiences from many others. White people steal from our cultures without offering anything in return. I can’t speak for people in Britain and India and Brazil or whatever. But, America has a history of demonizing something until white people do it while not allowing in those who created them into their cultures. So, I think some people are afraid of that happening again. So, they hold on to their culture too tightly.
Finally, I agree with others from different cultures speaking for us, whoever us may be. I know they mean well, but it’s very frustrating having two outsiders argue over what you find offensive or not.