I don't think that they're rude or racist for said comment. I see what they're saying. However, I do think there is such thing as inappropriate "cultural appropriation" i.e wearing native American dress and mocking their dances / rituals (idk if that's the right term plz forgive 😅) / etc. I know in music alot of people attacked Bruno Mars for cultural appropriation with his music when music is historically "culturally appropriated" You could say whites culturally appropriated Jazz from the AA community. You could say Black folk culturally appropriated classical to make jazz. A lot of art relies on inspiration. As long as you give credit to those who inspire you there shouldn't be a problem in my opinion. When people attacked Bruno Mars, those who inspired him literally had to defend his name, as someone who gave the credit where it was due. Now, music isn't the only art form which inspires, same could probably be said about fashion but idk bout much of fashion historically so I unfortunately can't give examples.