As soon as you began to hear rumblings of Native Americans receiving Federal Government Payouts, all this information starting cropping up about how many "slaves" Native Americans owned.
The Historical Revision of that GROSS exaggeration was precisely so people would ASSUME that any claim of being of Native American descent by African Americans, had to be our confusing our ancestors being Native Americans' "slaves", with being of Native American descent.
What they leave out of their Propaganda 'rumblings' and historical revision is the fact that, depending upon where you were in the country and the "laws" regarding "slavery", Native Americans were smart enough to SAY that the Black people on their reservation(s) were "slaves", in order to keep the White man from being able to drag Black people off Native American Reservations.
Hell, this was even true in some parts of America where Black people had bought their own relatives or another Black person's Freedom. The way the "law" was written regarding "slavery", they often were not allowed to "buy their Freedom", but had to "purchase person as a slave"; which where a lot of the grossly exaggerated misinformation about how many Black people "also OWNED "slaves" in America, comes from.
Now, there is no disputing that some Native Americans and some Free Black people in America, actually, literally, out and out "owned" "slaves".
People's ignorance of TRUE history in general, and their own history in particular, arbitrarily taking any word of questionable or revised history as True facts, was banked on to solidify Black Native Americans and descendants of Native Americans out any monies due to them/their descendants.
I'm sure they convinced Native American leaders that more money would go to their people if Black Natives/Native descendants were [formally] cut-out, but I'm sure the truth is, that Native Americans got only a fraction of what they would have gotten, had they not betrayed their Black relatives for/listening to the White man, who probably pocketed every dime they conned Native Americans to forfeit, into personal off-shore bank accounts.
[BLACK AND BROWN PEOPLE NEVER LEARN THEIR LESSONS, AND KEEP THEM REPEATING OVER AND OVER AND OVER AGAIN]