She was vociferously unapologetic. She firmly believed that she was in the right, and even worse, that she was on some sort of gender-equality "crusade". The hubris is palpable when you see the comments she made in her post, where she said things like "Yesterday the future of programming was on the line and I made myself heard.", and even compared herself to Joan of Arc (
http://i.imgur.com/JnZLsju.jpg).
Even worse, she went off the deep-end by claiming that people disagreeing with her were all trolling, or worse, somehow being racist. She also posted comments where she discounted other people's opinions simply because of their race.
There was not an ounce of remorse on her part for what she did. She firmly believed that she was some sort of holy warrior for feminism, and that she was standing up for future women programmers, or something like that. It's also odd considering that she doesn't even have a programming background; her background seems to be in HR and marketing. She basically hangs around programmers, but is not really a part of the programming community.
What was also bad is that she implied that SendGrid supported her in all of this (http://i.imgur.com/eHOC3tA.jpg), thereby dragging them into her personal crusade.
As a tech evangelist it is her job to build goodwill and she did anything but that. She took advantage of her huge listener base and used her platform as an evangelist as a personal soapboax for her own holy war.
Hopefully she learns from her mistakes. The best thing she can do at this point is to issue a public apology. Another company may give her a chance then. The problem is HR issues like these are very touchy and toxic and most companies would sooner not deal with it. This is because people who display this kind of attitude can be extremely toxic. I read many comments from women programmers who completely disagreed with what she did, and they said that she completely overreacted. Does any company really want to have a person who will scream "Sexism!" at the drop of a hat? Sure, the guys may have been immature, but nothing they said or did was even remotely sexist. Most of the people who I've seen defending her are either white knights, or other women who share her "brand" of feminism and who also, unsurprisingly, share her lack of technical background or experience with the programming community.
The irony is that one of the guys shamed on twitter, who lost his job, has had a much easier time finding a new job. I don't think Adria will have a same luxury.
The biggest irony in all of this, of course, is that what she perceived to be a morally-righteous stance has completely backfired and bit her in the ass, causing her to lose her job.