She got him fired? You mean, she went to his employers and said “this guy, you need to fire him, OR I WILL KILLZ YOU ALL YOU BAD MENZ BWAH HAH HAH HAH” ???
Or did she post what he had written, and let nature take its own course?
Are you saying that the man had a reasonable expectation of privacy in a public exchange he initiated, that she’s at fault for publicly posting what he wrote, and it was her responsibility to ensure that nothing bad would happen to him as a result of people finding out what he wrote? That she should have kept his writings to herself? Because she knew what would happen if other people knew, and so she’s to blame? Because the guy did nothing wrong, and he was fired because of her, not because of him, because she shooped the screenshots, and it’s a put-up job, and he’s a really good guy and we shouldn’t blame him for his words, they’re just words, and his bosses should know that and not fire him because of somebody else’s words because his words are innocent and blameless but her words where she quoted his words are mean vile wicked evil and at fault?
Please correct me if I’m mis-characterizing your post.