This is a reminder to not dress up as an indigenous person. Their culture, beliefs, and regalia ARE NOT some cheap costumes. By doing so, you are supporting the ongoing erasure of the first nations people. Not only in the US, but also Canada, Mexico, and the other indigenous peoples around the world.
They are not extinct, aliens, or fantasy. They are real. Real people who have had their land, people and culture stolen from them time, and time again. They're people were raped, tortured, and killed by colonizers. There kids forced to go to "residential" schools where nuns and priests cut their hair, and stripped them of their identities. Bodies were discovered at said schools in Canada, validating the stories they told the public.
They were here before us. Honor them. Don't erase them.