Fifty songs, one song, her private diary entries, a racial slur she once carved in a tree, Kathy Griffin’s controversial political stunt, Lori Laughlin’s college cheating... it doesn’t matter what it is. Once an organization feels a person’s image is no longer good for their brand, they’re free to cut ties.
I don’t have the slightest interest in baseball nor do I know anything about their museum, but seeing that it’s a museum and museums are places for historical preservation — the good, bad, and ugly aspects of history — then I would say that racist memorabilia is right where it belongs.