Her paper got got flagged during internal review. There wasn’t time to revise it because she submitted it late. She then wrote an angry rant to her coworkers that claimed she was oppressed and told them to stop working. And then she demanded the name of the anonymous reviewer and threatened to quit if the company did not meet her demand.
Your defense is that most papers were submitted late without a problem. Perhaps most papers don’t need revisions, but this one did, and there’s no excuse for how she handled it.
I’ve had papers rejected from my company’s internal review process. It sucks, but it’s not the end of the world. You make some revisions and submit to the next conference. You don’t go ballistic and tell your coworkers their work is meaningless and threaten to quit unless you get your way.