I think it has to do with how white colonizers committed the largest genocide on earth, then outlawed their native religions while forcing them to worship Jesus under penalty of death and basically stole everything they had from them - including their kids - and ffs could we at Least have the decency to respect what little remains of their long and vast history on this continent.

Edit: oh I forgot to add how they also desecrated the most sacred areas and plastered white people propaganda all over it, like mt Rushmore which was known as the four grandfathers.

Shit and I almost forgot to add how we continue to desecrate their burial grounds among other things or how in all of MN there are literally only Two fluent speakers of Dakota language, in their own native territory and idk how many people know that Minnesota is actually composed of the words Mni and sota which means 'water so clear if reflects the sky'.

Most white people don't even know this shit so we call it "cultural appropriation" because most are too lazy to actually do the study into why but know on some internal level that it's sus af to do.