Actually, Native Americans can't really complain about the Sooners. The Sooners' crime was getting into the opening land ahead of the gun starting the run. If they were land thieves, they stole from their fellow white folks.
The Boomers, on the other hand, were squatters on native lands. One of the black cavalry regiments--9th or 10th, I forget which--kept having to round them up and send them back to Kansas. The Boomers were led--until his death--by David Payne. The area in which he and his fellow squatters squatted is now Payne County. The county seat of Payne County is Stillwater, home of Boomer Lake and Boomer Road. And Oklahoma State University.
Per Romans 3:10: "As it is written, There is none righteous, no, not one . . . ."
We all live among institutions that were created in earlier times, times in which black people were enslaved and otherwise oppressed, and in which Native Americans who resisted the tide of occupation and settlement were defeated and confined to reservations. Institutions and people that/who did not actively oppose the oppression are now seen by many as beyond the pale. (And even "the pale" was a term of oppression.) Even those who worked against slavery, and fought to destroy it, and even those who tried to mitigate the harshness of Indian policy, are subject to having their statues toppled and their names sullied.
It has not pained me to see black athletes and students at UT complaining about "The Eyes of Texas." Trouble for the hated opponent and all that. But I have acknowledged that the "racism" argument is pretty thin. The offensive part of "I've Been Workin' on the Railroad" is really the "Someone's in the Kitchen with Dinah" chorus, and that is not part of even the tune of "Eyes." The only connection to slavery (other than Texas' just general wrongness) I've been able to see is that whoever first said "the eyes of Texas are upon you" was alluding to something the governor (?) of Virginia said about the "eyes" of his state during the Civil War.
Now, the history of the UT band uniforms, with their origin in a "cowboy minstrel show," is really cringe-worthy.
Iowa State has a history to be proud of. It was the only school that would admit George Washington Carver, and Jack Trice Stadium is named for a black player (son of a black cavalryman, BTW) who died of hemorrhaged lungs and internal bleeding two days after getting the hell stomped out of him in a road game at Minnesota. But I'm sure that there are racial skeletons in the ISU closet too.