Nothing new here.
United eats it's young and most pilots there have the "yank the ladder up behind them" attitude. It's been going on since the 1990s.
The good thing for regional pilots is that UAL is an airline that cannot survive without regional jets. Kirby wants them and the UAL pilots will eventually cave as more and more continue to replace the UAL narrowbody fleets.
History repeats itself over and over with this place.