This quote smells like BS. I can't find any actual attribution for it. I bet it was a white person claiming 1/64 Cherokee who made the quote, and the "great threat great great great great granddaughter of a Cherokee princess" made the picture.
The reason I think that is it's just a whole lot of negative Indian stereotypes and red flags. No attribution to an actual person or even a tribe. It reinforces old English paranoia about Indians worshipping Satan. It's mostly portraying Indians as hapless victims that no longer exist.
Notice how he talks about the present? Notice how he clearly calls out the attrocities, and then comes to the conclusion that all humans are equal. Notice how he's not just resigning himself and his tribe to hell, to escape the white man?
I know this will get heavily down voted...
But as if they didn't kill each other with bows, disease and in the name of religion? This seems pretty universal in history. Idk.