Earlier quoted context omitted.
There is still a civil way to accept a resignation, with proper timelines and transfer of responsibilities. She offered to resign in some time due to some demands, and the immediate termination seems to be related to an email unrelated to those demands. This sounds a lot like a sleazy move by Google to couch an immediate firing as a resignation.
Google did the right thing and they were civil. She made some pretty serious demands, not having been met, with such politicization there's no reasonable way to accommodate a longer handoff, and she knew that. Waaay too much risk there. She set her own terms, they accepted, that's it. She should have been more transparent in this, because in her Tweets she wasn't forthcoming that it was her terms. There are a ton of…
All we know is that she gave a hardball ultimatum, and Google accepted option 2. I don’t know enough about what’s going on, but if you say “Do this, or I quit,” you have to be prepared for them to show you the door immediately. That’s how at-will employment works.