So it's asinine then to let a good coach go when you know you have one, just because the fans are pissed and want everyone to go. Bad decisions are made with emotion, like firing Tannenbaum the day after a bad game and bad season.
Him being a good coach is subjective. His defensive scheming this year hasnt been very good (consistently bringing the house on 3rd and long and stranding the secondary sticks out) and we all know he hasnt put a good and consistent offense on the field arguably ever.
In the NFL, sadly, you need a good QB and offense. Rex has not proven that he can put that together, and he's had 6 years to do so, with 2 GMs and 3 different OCs. Not many coaches last through that amount of turnover. If he loses this team in the upcoming weeks, he's gone. There was already talk of players not practicing/working hard enough from the vocal leader of his defense.
If this team finishes 4-12, I would have no problem letting Rex go and signing an offensive HC that could bring a different philosophy here. (I would hope Idzik is gone as well and we start fresh)