The premise that it can't be bad people at the heads of the bands screwing over the people of their own moieties is FALSE.
The flaws of greed and selfishness don't limit themselves to those who are put forward as being the 'cause' of current economic disparities.
The idea that good and evil is easily identified and that that those who were somewhere first are all virtuous and holy; verses those who showed up later being broken and evil; is a classic 'divide and conquer' type of narrative.
Many groups are impoverished because their relatives, who run the plantation, don't share the wealth with the rest of them.
That 'Anthrax blanket' narrative is crafted to create division.
It's equally as likely that someone who would trade in poisoned blankets doesn't care who gets the blankets as long as those are paid for, in either money or trade.
The separate but equal plantation mentality extends to the rulers of Reservations too.
The political classes of those locales suffer the same diseases of selfishness, greed, and elitism as any other political class. This disease of bad leadership is not based upon moiety but upon position within a political organization.
The false narrative spreads a blanket of lies over the public. The poison used this blanket isn't Anthrax but the lies and misrepresentations of History that are designed to divide peoples, and to make them easier to manipulate. The public can be controlled throuh their anger over things that never actually happened to them.
As deadly as bad governance is, and the killing fields of died in the wool true-believers being so common . . . the blanket of false narrative, which is real and current, is far deadlier than some historical account.
The 'diseased' blankets story was about blankets infected with Small Pox. The story came out of the Indian Wars in Western Pennsylvania. It's the only account of poison blankets that I've ever read or heard about. If you know of others, please provide sauce (references)