Same person/people who dictated that the hire could not be white, in the first place, of course. Wild guess is Gable, regents, and/or some prominent boosters. Very concerned about the current cultural "moment" in this area, and how the wrong move could be a PR nightmare for the U.
Trying to please as many people as possible.
Is it really that hard to fathom?
Here is an easy couple lines that I made up right now:
Coyle - "Ben, I want you to know that if you accept this job, there will be certain ... ah ... stipulations, on whom you'll be allowed to consider for your assistants. Do you understand what I'm saying"?
BJ - "Yes I understand, and that won't be a problem".
Get it? Shouldn't be hard.