Massive over generalization. Sort of like saying a lot of people hated Sean Payton in Dallas.
I think it's fair to say he wasn't a fit for this team while Parcells was here. I think it's also fair to say he's had a lot of growth professionally from when he left the team in 2006. He might have been a better HC than Wade Phillips. But we passed on Ron Rivera too, so being good for the job doesn't have much to do with getting this job.
Zimmer was viewed in a much worse light than Payton, and it wasn't even close. He was pretty bad as coordinator in Dallas. I am shocked he's come such a long way since then.
It says something that Parcells kept Zimmer around as a holdover from the Gailey/Campo years. He must have saw something in him.
I always liked Zimmer. The guy was just a poor fit for Parcells 3-4 defense. I don't remember him being hated like Schmitty put it. I remember a lot of people just wanting a defensive coordinator who was actually familiar with running Parcells system. It's hard to have a defensive coordinator teaching a defense that he is basically learning himself at the very same time. That has never made him a bad coach though.
And what he is doing with the Vikes is pretty impressive. He is winning with a bus drive at QB which is extremely difficult to do in the NFL.