Political correctness
'…fellow Googler reading: "You're a misogynist and a terrible human. I will keep hounding you until one of us is fired. Fuck you."
That employee was given a "final warning" from Google bosses, we're told.'
Damore is fired for writing a carefully argued statistical paper. The other person is allowed to stay despite an offensive rant. That is what happens when political correctness is allowed to trump rational argument.