They are not casual items of clothing they are for ceremonies and certain individuals of importance. Headdresses are sacred, special pieces for many tribes. Yes, you can do it, and no, you yourself did not own slaves – but it’s still gross, because you as a white person benefit from what your ancestors did, and should respect how that affects others and the world around you. This is akin to a white person dressing in blackface and playing a slave on Halloween. No, white people can’t change that – but what they can do is respect that that happened, and not do things that insult the indigenous people who are still here. While Kentworthy did not participate in that, he nevertheless directly benefits from that genocide just by virtue of the fact that he lives on what once was native land. Kentworthy’s ancestors are directly responsible for the genocide of indigenous peoples. I’m saying this as a queer person who’s half Native. I have no doubt that many white gays will scream about the following PC writing I’m going to do, but I’d ask them to at least listen.