It's so funny, I get that their offense has been pretty bad most of the year but they're 8-3 and booing their team 5 minutes into the game. A tied game at that.
Despite the fact that we haven't won shit in 30 years and they've won two SB's their fans can't get away from their pathological inferiority complex, so one hard loss to Dallas despite being 8-3 puts their self-hating fans right back into a despair loop that they project onto their team.
I have no doubt that the irrational angst and anger from the fans all week and coming into this game affected the team with how fragile their offense is.