"When Samuel Henry was a kid growing up in D.C. in the late 1950s, he and his friends were devoted Washington Redskins fans — they had the jerseys and knew the lore. And as the lore had it, the “reddish-brown tint” of paint on the team’s downtown D.C. headquarters came from the blood of Native Americans. “When I was a kid, me and my friends, we really thought that they had captured and killed Native Americans and pasted them all over the building,” Henry said. “We were just kids, we didn’t know any better. But we really, honestly believed that.”" quote from http://fivethirtyeight.com/features/
"Mr. Cooper, a full-blooded American Indian, said his daughter became so offended, her eyes filled with tears and she asked if they could leave."
That is why it should be changed because it can be very offensive to some people.