Teddy Roosevelt talked about taking the remaining Indian lands by war. He said, “It is a primeval warfare and it is waged as war was waged in the ages of bronze and of iron. All the merciful humanity that even war has gained during the last two thousand years is lost. It is a warfare where no pity is shown to non-combatants.”
Abraham Lincoln gave the go-ahead to the U. S. Army to hang 38 Dakota warriors in Minnesota in the largest mass hanging in the history of America. Thomas Jefferson, a slave owner, signed on to the Louisiana Purchase, a deal that took millions of acres of land from many Indian tribes without their approval, including South Dakota, and in the end, caused misery, suffering, death and poverty that is felt by the Native Americans of this region even to this day. And we should not forget that the man known as the father of this country (at least to the white people), George Washington, ordered the extermination of the Indian people of New England. He was also a slave holder.
Native American activist Russell Means has labeled Mount Rushmore, The Shrine of Hypocrisy. In this instance he speaks for many Native Americans. You must also remember that Native Americans had a history long before the coming of the white man. Most Indians do not consider the signors of the Declaration of Independence to be their “Founding Fathers.”
The only way the Crazy Horse memorial could get built is the way it's been done: in the middle of nowhere with private financing. Americans would howl in protest if the government tried to honor Sitting Bull or Geronimo with an Indian monument near the Washington Monument or the Lincoln Memorial.
For more on the subject, see Best Indian Monuments to Topple.