University of Oklahoma students in fraternity Sigma Alpha Epsilon were videotaped on a bus clapping, pumping their fists and laughing as they chanted, “There will never be a ni**** SAE. You can hang him from a tree, but he can never sign with me. There will never be a ni**** SAE.”Two students were expelled and the fraternity house has been closed.We’re reminded that Donald Sterling lost his ownership of the Los Angels Clippers basketball team last year, also for racist speech that was spoken in “private” but caught on a recording. So the lesson may be that old attitudes toward racism are no longer to be tolerated.For too long, we’ve treated shameful behavior as excusable.