This doesn't at all sound like the case. It sounds like the company did something aggressive, she got representation who threatened to sue, and the company backed off, and all of this happened over a year ago and is essentially a closed chapter.
Very credibly threatening to sue your employer with a legal firm, regardless of whether you were in the right to do so, is never a closed chapter. Companies are made of people, and those people are not going to forget something like that. They're going to be waiting for their first chance to get rid of you.
Right or wrong, justified or not, if you threaten your employer with a lawsuit, you need to be looking for a new employer that very same day. The employment relationship is now irrevocably a hostile one.
What you called out as "doesn't at all sound like the case": [1: they continued employing her for months and months] [2: while her lawyer was threatening to sue the company]
First paragraph of the email OP posted, which I am defending as worth sharing: "This happened to me last year. [[1]: there has been 11+ months, or months and months, since this occurred and she continued employment] I was in the middle of a potential lawsuit for which Kat Herller and I hired feminist lawyers who threatened to sue Google [[2]: her lawyer was threatening to sure the company]"
My reading is that the situation you're describing is resolved, and has been for quite a while. Thus no lawyer is currently threatening to sue, nor have they for quite a while.
Thus: an employee asserted her rights under the law in the past, and the situation was, apparently, resolved to everyone's pleasure. "recently conspiring a legal battle against Google" is a misrepresentation of that.