The guy is absolutely pushing an alt-right agenda, it's plain to see in the manifesto, and that's before we get to his guest appearance on a prominent alt-right YouTube show.
You don't know that, and I get little impression of such from his Bloomberg appearance today: https://www.bloomberg.com/news/videos/2017-08-10/fired-engin...
Even so you are aware the Quora question is "What do scientists think about the biological claims?", so the ad hominem is not only a distracting annoyance but is also undermining of one's claim to objective impartiality.
None of this means that they are wrong on the substantive points they make though, even though you're right that the alt-right claim isn't helpful. In fact I got the impression of someone who feels very strongly about the issues, but who is still trying to engage logically and reasonably and in good faith, even if they slip occasionally. Much the same can probably be said for the original memo author.
According to the Guardian[1], "Damore initially told the Guardian he would answer questions by email on Monday, but then stopped responding to inquiries. He had a few brief email exchanges with reporters, including at the New York Times, Bloomberg and the rightwing site website Breitbart."
Giving an extended interview with Molyneux instead of the NYT or even Breitbart is not recommended if you want to avoid being seen as anti-feminist or "alt-right".
[1] https://www.theguardian.com/technology/2017/aug/09/james-dam...