It probably makes as much sense as an African-American dressed like a Native American except with technicolor beads and feathers.
Escaped slaves hid out in Indian villages and assimilated into their culture. Thus, Mardi Gras Indian rhythms are both African and American Indian.
You see it and hear it all on Super Sunday. In fact, now you see regular white folks in the Mardi Gras Indian entourages. And I swear I saw a guy who might have been Jewish dressed in a chief outfit.
I suppose this is all good news. We aren't fighting - except fighting over wanting to be part of the cultural mix.