The reason feelings of cultural appropriation exist is because the children of immigrants feel like society treats them as foreigners because they’re not white, despite growing up all their lives in the US/UK etc. This leads to feeling like some dipshit is enjoying the food and fashion of your home culture while rejecting it’s people. Think about a Maga moron voting to kick out all the Mexicans while wearing a sombrero and eating tacos; it’s a hypocrisy of culture vs race.
I’m telling you how people feel, I’m not writing a manual towards a post race society. When people feel ostracised because they look Mexican, they get salty about the same society who routinely rejected them and made them feel like outsiders gleefully housing down Mexican food and cosplaying at being Mexican.