Perry Sook attached a letter to employees when the press release was sent internally too. He said they had "constructive" discussions with ABC/Disney. He also said Nexstar "regrets" the earful stations had to endure (especially ABC affiliates) over some stations receiving threats and had hostile conversations with the public.
It is no coincidence that both companies decided, within a couple hours of each other, to bring Kimmel back. Sinclair even had the audacity to say ABC didn't accept their so-called "proposal" (read: demands) to "strengthen accountability, viewer feedback, and community dialogue, including a network-wide independent ombudsman.” I wouldn't be surprise if Iger told them to pound sand and how dare they make demands on how a totally different company operates.
I can absolutely believe that either:
A) ABC threatened to strip affiliations and clearly wasn't bluffing
B) ABC threatened to not give them SEC football (Georgia-Alabama is tomorrow, and both have a huge southern presence), Monday Night Football, or ABC News programming removing any reason at all to watch them or
C) both
At the end of an AP story:
That would have been a disastrous headache for everyone and even NexClair realized they couldn't handle it.