What bothers me the most about these movies is that the basis of their allegory isn't exactly real. They're based on a FANTASY spin on actual history.
The history of "European/Indian relations" isn't fully or accurately taught any more (was it ever?): the common acceptance is that the settlers, without provocation, wantonly slaughtered the natives and stole their land.
What is almost completely ignored is that there was little concept of private property, rule of law, justice, and freedom (including freedom from violence) among *nomadic* native tribes. Addressed even less are these tribes' barbaric practices -- cruel rites of passage, slavery, rape, murder, human sacrifice, mutilation as punishment for criminals, abandonment of the weak, torture, cannibalism, "knowledge" and "wisdom" obtained with hallucinogens, and severe punishment of anyone that demonstrated individuality, reason, or disobedience to the authority of witch-doctors. These attributes didn't suddenly vanish when white people showed up.
The initiative destruction of native peoples by settlers occurred, but very infrequently. In more instances than not, colonists attempted to trade with the natives -- i.e. tried to treat them as equals -- bringing modern technology, conveniences, and Enlightenment ideas in exchange for being allowed to establish towns -- and they were rewarded with unprovoked, brutal, bloody raids BY these natives.
This isn't "white perspective" or even "racism": it's simple historical fact. I absolutely do not condone any form of racism, slavery, genocide, colonialism, Manifest Destiny and the lot -- it's as barbaric in nature as the savages were. I'm not implying that that *all* natives (certainly not their modern descendants) remained savage, nor does it imply that *all* settlers and expansionists were peaceful, Enlightened victims.
Yet, I won't fall for revisionist history and the moral recrimination of centuries-dead Europeans, and I won't be suckered into believing in the archetypal "noble savage" (which is as obvious an oxymoron as they get).
So for once, I'd like to see a "spin" on the "white/human goes native/alien" story:
A MODERN human (his/her race being completely unimportant) enters a SAVAGE alien society, and demonstrates the value of a civilized technological culture that arose by abandoning barbarism. The film ends with the savages doing likewise, living the longer, healthier, more productive, more comfortable, and ultimately happier lives that can only result when superstition and primitivism are abolished and science and reason embraced.