I have been critical of Jamrog because of some boneheaded things he has done and said since getting here, and certainly his requirement that players call him "Coach" and his headset are just a few of the things that make him an oddball character. That being said, as an administrator he has been alright, and he actually took the time to respond to some critical emails after we announced some future schedules filled with patsy games. One of the first acts when he got here was to throw the previous scheduling/schedulers under the bus because they filled it with some easy games. There were direct quotes where he took shots at people like Tim Cassidy because of how the upcoming years looked, and here is today announcing some future non-conference schedules that are at best, on par with those that he inherited. Again, kind of goes back to the PR campaign waged when we transitioned to Pelini as our coach, everything and anything from the previous regime needed to receive the "slash and burn" treatment, because as we all know, not only was Bill Callahan and his staff bad a coaching, but they also performed abortions on the side and volunteered as puppy killers at the Lincoln pound. Yep, a group of baby and puppy killing no good people who couldn't coach worth a lick.
We just jumped off the cliff here. There was never any kind of concerted effort by the NU Administration to disparage the Callahan Era. All the criticism you heard came from those outside the current organization, from former players to fans. You did not hear comments from Perlman, Osborne, Bo Pelini or anyone else where they publicly disparaged Callahan, Cosgrove or Pederson. If you can point to those, they'll be the first time I've seen them.
Certainly it cannot be ignored that under Pederson/Callahan (and mostly Pederson, as we're finding out as time goes on) there was an effort to steer the culture of this program away from what it was under Osborne and Solich. For that, Pederson definitely deserves criticism - far more public criticism than he's received from official sources. The fact that there hasn't been a public tar-and-feather session speaks volumes of the character of our current AD and his staff.
That's not to say that there haven't been references to Callahan, Cosgrove and/or Pederson - but you cannot avoid them. You can't simply pretend those years didn't exist, and you cannot refer to them in positive terms. The years under Pederson, especially after he fired Solich, were the darkest time of our program in the last 45 years. Necessarily references will be negative, and the fact that they are largely glossed over when referred to at all rather obviates the "puppy killers and abortions" reference.
If we're talking about the fans, meh. The fans are going to say whatever they want, and you can't stop them. They express themselves differently than those working at Stadium Drive, and their comments and attitudes can't be applied to the Athletic Department.