Google was wrong to fire Mr. Damore, but the firing was completely predictable, even if Google didn't have much of political reason to do so (I mean, they probably did, but even viewed purely as a way to assuage external/internal concerns, the firing was justified). Really, Google had to fire Damore once the memo leaked in order to save face; otherwise they'd come across as condoning his political views, which of course they can't do for a variety of reasons, not all political.
Mr. Damore had to have known this, and he had to have known that somebody would leak his memo... it's too provocative for either those deadset against him or in agreement with him not to do so. Or perhaps he leaked it himself.
So why would Damore put himself in a position to be fired?
Think about the poll results. Those aren't just local to Slashdot; they reflect a general feeling permeating not just the U.S., but much of the Western world... and that feeling is growing and intensifying. Having his particular viewpoint, Damore was probably frustrated at Google, observed broader anti-Left sentiments, and decided to tap into the zeitgeist. Now he'll come across -- rightly so -- as someone punished for daring to speak his mind about diversity and individuality... to "speak truth to power" as it were. And people will predictably lap it up.
What comes next?
Well he'll probably get a wrongful termination settlement, since it was pretty evidently a retaliatory firing based on political views -- really, Google cannot come out of this looking good, so they'll be quick to settle. He'll also become a darling of more libertarian/right-leaning talk shows: expect to see him on the Rubin Report, possibly Sam Harris's "Waking Up" podcast, Rogan, and mentions on a number of other platforms (Sargon, Jordan Peterson, etc.). Who knows? He may be the next guy interviewed on Fox News to illustrate yet another example of the authoritarian Left gone too far. Moreover, whoever hires him next (assuming he wants to continue in software engineering) will come across as a company focused more on merit than political posturing, so there will be a PR boost for them (probably enough to more than offset any detraction), meaning that there are probably employers lining up for Damore -- if he hasn't been hired already.
The point is, there's actually a lot of upside for Damore's firing from Google, that upside is predictable, and I'm betting Damore predicted it. This doesn't mean that Damore's concerns are invalid; it just means that he's probably an opportunist who recognized a unique opportunity to be a first-mover of sorts. He's got the spotlight now, a largely sympathetic audience, and I doubt that the power that entails is lost on him.