Bone Tomahawk is already like basically a racist old pulp adventure novel/comic but with extreme violence and an extremely thin excuse of "this well groomed Native American in a suit comes on screen and explains that the bad guys are completely fictional and not related to any actual tribes."
So on the one hand it's surprising that the director wouldn't stay there right before things just become undeniably racist, but also entirely unsurprising for chuds to push their bullshit as far as it goes.
It basically just sounds like closeted semen retention types who wont consciously admit that they are concerned about their sacred orgone and precious essences.