It's funny because, Chakotay is a racist stereotype. And these people who complain about your analysis of Chakotay *cough*David Brin*cough* will likely complain about the Dark Elves or Jar Jar or any franchise other than Star Trek. Even the fact that Harry Potter's a WASP has not escaped their notice.
(And despite what Rob thinks, no, Kirk isn't half Sioux. Remember, the novelizations aren't canon for Trek.)