The Athletic Director is hired by the University President. He hires a head coach and in this case has the blessing of just about every fan at Nebraska.
If the head coach goes after a player or not is his decision. They don’t owe fans an explanation of why they do or do not.
The internet has empowered too many fans to think they are owed an explanation.
Let the people hired in these roles do their jobs. Judge the performance of these leaders however you want - wins and losses, graduation rates, developers of men, etc. beyond that, let them do their thing and be a good fan without thinking you’re entitled to insider information, because as a fan, we aren’t.