First, those who are upset with how the program has stagnated are not the vocal minority. If you listen to any local talk show not controlled by Steve Pederson, there are more who are frustrated and growing less patient with the current regime than are satisfied with it. Only on the Internet are there more anti-Solich people.
Second Frank is a Husker. He poured his blood, sweat, and tears onto the turf at Memorial Stadium. He coached for over 20 years here, was a big part of multiple New Year's Day/BCS bowl games, numerous conference championships, 3 National Championships, and coached 2 Heisman winners. These are simply things that Callahan has not done, and likely never will.
Saying that, you should still support Callahan and hope for the best, but to totally disrespect Solich is totally anti-Husker, something I would expect from a BRB Pederson stooge .