Why should Indians have the right to make the decision over how their name and image are used? Because in the absence of a compelling reason to override that right, a person or group of people should have control over their name and image. That's part of what it means to be a person with full humanity. And in this case, the argument for white people giving Indians that power is intensified by the magnitude of the evil perpetrated by whites on Indians.
To acknowledge all that is to acknowledge that the American nation is based on genocide, on a crime against humanity. The land of the free and the home of the brave, the nation that was born as the vehicle for a new freedom, rests on the denial not only of freedom, but of life itself, to a whole group of people--for the crime of getting in the way of what the European invaders wanted for themselves, the land and its resources.