I don't get the hate.
Nolan did help build this team. He brought in MS. Why have bad feelings? Honestly he helped turn the team around. What he couldn't seem to do is get the team back on a winning track. His termination and Singletary seemed to be the spark we needed to get playing with the talent we had. For whatever reason Nolan couldn't. Was it because he was a bad coach? Not likely, he's doing great in Denver. Then again some Coordinators don't make good HCs.
More likely in my head is that he was tied to a team that was losing for so long that he couldn't make the players see the vision. Regardless of fault, he needed to go.