I know that no Navajo leaders have spoken on it because there was no official statement issued because I looked further into the situation. People who are heads of large organizations such as tribes, nations etc, tend to do things called press releases to condemn offensive media. And I'm sorry I insulted your demographic but as someone who is forced to spend quite a bit of time around early college goers, they are a large part of the problem and a blight to progress in race relations in general. They like to talk a lot about things... and then they don't even interact with people outside of their own race or culture aside from the people in the service industry, or people who were once their "friends" in high school (people who they never hung out with outside of school).
"And again, you say that because it's fantasy, it shouldn't be taken seriously, but that is not the point and you know it. She has taken a Navajo myth, a part of Navajo culture and is using it to her own ends. Placing it into her fantasy setting does change the fact that the skin-changer is a part of Navajo culture and lore. No matter what she does with it, it's still a part of Navajo culture. It doesn't matter if it's fantasy or not. This is not something that can be hand waved away by "it's fantasy, I don't have to justify it.""
By this logic no one should never change the Arthurian legend for the same reason. And how dare anyone Latino or African American deign to touch European or Asian legends and myths or interpret them in their versions of fantasy. How dare someone of Jewish faith write about Christianity. How dare a Muslim write about the Hindu faith. How dare a Latino write about white people. See, it's a very slippery slope that can be used to justify some very nasty sorts of racism. Frankly, I find the segregation of cultures you're proposing offensive. Essentially, whether you realize you're saying it or not, your argument is no one can interpret any culture other than their own which is frankly disgusting and leads to a whole treasure trove of ignorance that breeds hate and bigotry.
"if the thought that people might be offended and cry racism or sexism stops a person from writing a thing, then good. That means that we are becoming more conscious as a society and aware of the importantace of respecting other cultures and the value of minority groups. It's a good thing"
Fear of reprisal doesn't breed respect or understanding-- it enforces white washing. Fear also breeds more racism. Then you end up with the Oscars (why not have more non-white writers? because they can't find jobs outside of writing about non-white people thanks to the problem created by your argument). People being afraid of writing something because of the backlash they might receive is the opposite of progress. When no one attempts to engage with cultures outside of their own it props up racism because it promotes Othering and exoticism that leads to fetishizing.
So yes, this is needless backlash.There are real issues out there facing the native community that this trite is taking attention away from.