I don't want any group telling any other group they have to conform to their definition of a moral code. Gays, straights, muslims, athiests, christians, tree huggers, vegans, PETA...
Equal rights and opportunities for all. (obvious exceptions of course, like murder and robbery)
murder denies someone the right to life, robbery denies the right to be secure in your possessions. Criminal actions because of laws enacted to protect basic rights.
People have a tendency towards biases and prejudices and a whole lot of other "comfortable" context issues, and are emotional as well. History is replete with instances of how we can be ignorant to others, and even pass laws that have either the intent or unintended consequence of denying others their basic rights. Slavery, and the whole history of Indian Removal and reservation gulags, and the innumerable crafty little ways we have "legally" edged others out of our way.
The problem with Marxism as an ideology is that sets up a false context for everything, a sort of false memory and false history painted in terms of a false "inevitable" process in broad societal terms, rather than recognizing the basic conditions of human existence in personal terms, and addressing "change" in terms of human choice and intelligence, allowing us to just be what we are, or want to be.
It was just not in the thinking of the times, on either side of the native American question, to approach the problems in that way. The Indians were accustomed to their way of life, and the European settlers to theirs, and the land hung in the balance. We could hardly expect native Americans to go file their claim to their square mile, or know how to farm, but we did not even honor the treaties we made, nor include them in the equation as citizens with protected rights.
Still, a native American born today has a better start in life because of status as part of a collective "reservation", often with income from royalties. The problem is the kind of socialism that sorta kills the idea of taking personal action, initiative, and responsibility that could lead to an actual secure "personal independence". Today, the native American is included in our equations for the same rights any other person has. That much is progress.