@Rockhead,
It is interesting that both William Prescott and Francis Parkman, respectively the 19th century American experts on Spain in the New World and France in North America, seemed to have made a genuine effort to separate their own religion and world view from their reportage on the aboriginal Americans. Both acknowledge that often the only records they have are those provided by the conquerors. Of course, being Protestants, that may have been due to their disdain for the Catholics who were the Spanish and French colonizers. Nevertheless, Parkman, for example, reports the comments of the Jesuits with a great deal of skepticism and scorn, while pointing out that the French got along much better with the aboriginal Americans than other nations did, and compares their policies favorably with the English Protestants of the North American Atlantic coast. (The one exception being the Iroquois. Within weeks of landing in what became Canada, Samuel de Champlain joined an Ottawa war party which badly damaged and drove off the annual Iroquois raid. The Iroquois never forgave the French, and spent, literally, more than a century attempting to exterminate them. In fact, they attempted to exterminate all of the aboriginal allies of the French in an attempt to bankrupt the French fur trade and engross its proceeds for their own trade with the Dutch and the English.)
Prescott, whose monumental work runs to more than 20 volumes, divided each volume into tomes, and at the beginning of each tome, he does sketches of his historical sources. He frequently does thumbnail biographies of principle primary source writers, and that included aboriginals who became Catholics, learned to read and write Spanish, and wrote accounts of their own recollections of the conquest and those of their fathers and grandfathers
By and large, though, the Dutch and English Protestants seem to have had no interest in the history and ethnology of the aboriginals. They just wanted them out of the way.