As I said already, you may disagree with this guy. People have said here that there is no scientific evidence and yet there is. It may not mean anything or be conclusive or be relevant but it is not zero.
Then you get this interpretation that he has said women can't do the job. At no point does he say that. Yonatan Zunger suggests that he argues "that some large fraction of your colleagues are at root not good enough to do their jobs". But where? Somehow he has made that up himself as he read the piece.
The author instead says that on average fewer women are interested in doing the roles and that such disinclination is inherited. He does not say that those women who are interested are less so or that they are less good, simply that there are less of them.
Now, that sentiment about inherited disinclination could be nonsense but just because in your opinion what he is saying is wrong does not mean you have the right and the logic to turn what he is saying into something else, saying that women can't do the job, or won't do the job or shouldn't be doing the job. None of that is in there.
It still feels to me that sacking someone because they say they "believe it is possible that on average fewer women inherit an inclination write code" is an attack on diversity not a promotion of it.