You're suggesting it would be better if we cover up sexist behaviour?
(Aside: I personally agree with the female professor's comment - it would have been better if factually sexist behaviour was pointed out directly to the source to give them the opportunity to recognise it. But, behaviour like this needs to be called out somehow.)
Really? - I'm suggesting we cover up sexist behaviour.
No I'm suggesting if you are going to publicly accuse someone of sexism you should have something to back that up. I'm suggesting as you note yourself that it's unfair to say nothing and then suddenly post accusations on the internet. I'm saying that if her adviser is an asshole he wouldn't be the first - but there is nothing in her post or her circumstances that really indicates this.
Its like this adviser is necessarily going to be a sexist douche to the author's face, yet this adviser never graduated a female PHD student (which the author had to find out from another channel) and the conference the adviser run hasn't had any women represented for a period of years.
Just because someone isn't directly disrespectful to you to your face doesn't mean they don't have bias or aren't sexist. It is not incumbent on the people with no power in that kind of relationship to provide evidence to satisfy your disbelief.
How do you know this is strictly because he is sexist?
What if I'm a hiring manager, and I had 50 applications, 25 Male, 25 female. What if all the female candidates were really bad, and I ended up hiring 10 men? Is that sexism?
People are really reaching. I have yet to see a direct case of male vs female sexism on HN. It's usually heavily extrapolated and begging for an implication.
Did we read different articles? Because I read multiple, very clear and specific accusations of sexist behaviour from several sources.
There is actually no comment about whether or not her adviser is an asshole: you are drawing that conclusion yourself, presumably from the behaviour described.
(Aside: I personally agree with the female professor's comment - it would have been better if factually sexist behaviour was pointed out directly to the source to give them the opportunity to recognise it. But, behaviour like this needs to be called out somehow.)