Here "white man" designates many things, but mostly western people. In shaman's words "nape". It isn't racial in this context, but a description of a cultural shock. He does not have a "racial theory" neither do I as far as I can understand what you mean.

It goes without saying that "French" is not a race, but a nationality. The idea of saying that it was written in French was just to provide a historical and cultural overview that engendered the ethnography in question noted by Bruce Albert trying to organize the speeches of David Kopenawa (the shaman)

I'm being honest with my intentions, but I assume it's a little difficult to understand your line of reasoning.