It's to aloleviate the guilt felt by liberals who need to have relief from the feeling that the US gets away with all the evil.
And lastly, it provides a carre of teaching ethnic studies to subsequent classes so that future generations will be able to experience the angst.
Now, how do I sign up for spelling?
What guilt? FTB, with "T" standing for "the" or "them". As I like to say, those who want to send me on a guilt trip will have to pay first-class fare, round-trip.
And don't forget the numbers. Having an "ethnic studies" department pretty much guarantees that the number of minority professors goes up. Even if Churchill were the world's foremost white expert on Cherokee culture and was more well-regarded than anyone in the field, including actual Cherokee, CU would not give him a second look.
Similarly for "women's studies".
Oh, and it provides a major that idiots can take and graduate in.