The biggest thing I've learned from RaceFail09 is that intent isn't nearly as important as effect. Even if the author thought that she was doing the right thing by removing all indigenous people from America to avoid stereotyping, the effect of what she did does give the message that at best, their presence isn't important, and at worst that they're a 'problem' best solved by their removal. It seems to me that if she wanted to have colonists in America with woolly mammoths and other extinct species, she could have just had colonists in America with woolly mammoths and other extinct species.