I find the advertisement in the picture both fascinating and disgusting.
The Native people are depicted as stupid children, thrilled by the gifts of soap, which are obviously a symbol of whiteness.
The depiction of their hunched bodies and exaggerated facial features are reminiscent of the Nazi depictions of Jews.
They are portrayed as the ones who have nothing, they are even dressed in blankets, whereas the Uncle Sam character is tall, upright, and a snazzy dresser in his smart suit and top hat.
Given that the genocide included the intentional gifts of blankets contaminated with the terrible disease smallpox, there is something deeply sinister about this portrayal of a gifts of soap, representing cleanliness, purity, whiteness and colonialism.