Who isn't supporting him?
I think people are looking around, as we should, to see what the structure is.
The easiest thing in the world for management is to make coaches their sacrificial lamb.
Most of the NFL has a structure that places all the blame on the coach, and that's what the coaches are paid for, but very few have a structure that consistently wins.
In every case where a team wins consistently over years, the coaches have enormous power (KC, SF, LAR, BUF, BALT, PITT). Dallas and Philadelphia are the only 2 outliers. And Philly hasnt been winning for more than 2 years anyway. Denver is the only team with a strong HC who hasn't won, but he just got there.