He is standing behind his employees; by protecting the jobs of those not involved in the drama. Any CEO who would stand behind an employee to the death of their company would not be CEO for very long.
Why did they feel the need to very publicly post this dismissal (and withdraw, and then reissue) in the heat of the moment while under a DDoS attack though, rather than sooner or later?
It very much feels like a cowardly act of throwing someone under a bus.
When your employee is being called nasty things all over the Internet[0] over something that happened while she was doing work you sent her out to do and your solution is to fire said person, then you are a coward. It doesn't matter if what she did was a mistake, if you had to reassign her, even suspend her or let her go eventually. When people are disrespecting your employees, especially employees associated with your good name, any decent leader fights back.
I totally agree. While I agree with the dismissal, it's like they're trying to save themselves by sacrificing an employee to the angry masses. Not a whole lot of tact going on in this entire situation...