Yes, I believe that the enemies within Drustvar are based on Native Americans, I might sneak a few memes into this
For one thing the Wickers that the Drust and witches employ, have quills on their backs slightly resembling humanoid porcupines, something a native American cryptid known as the Pukwudgie was known to be able to transform into, a creature that could also create fire at will and if annoyed would kidnap, push people off cliffs, or
also the creatures are said to have once been friendly to mankind but
You might say they are actually based on the Norse, since their concept art has buildings reminiscent of the vry'kul, but I have also seen these images and many of the pillars on them, have patterns that make me think of Native Americans, they don't look Norse to me
Their is also the fact that certain groups of native americans were hostile to early settlers in and around revolutionary war era Massachusetts(an area which Kul'tiras seems to take heavy inspiration from) for example Pocahontas' tribe(at least I think so, I'm not entirely sure) were only stopped from executing John Smith, because of Pocahontas' intervention, what happened back during early Kul'tiran settlement is sort of what might've happened if John Smith was executed