Doesn't sound like a good enough reason to fire someone. Alright, maybe if she was sending truly offensive/rude e-mails, but the article just says "confrontational"; there's nothing wrong with being confrontational: if something isn't being done the right way, act upon it. I wouldn't be annoyed if I received an e-mail all in CAPS, red and bolded. It would be more of a "pay really close attention to this!" kind of message more than a "I wanna annoy everyone with this".
They probably didn't like her in the workplace in the first place and were just looking for a silly excuse to fire her.
