I think to a large degree it's also about not understanding group dynamics. Let's say that:
35% or so of geeks are closet sexists in reform: aware that their belief systems are wrong / socially unacceptable and trying to change.
5% or so aren't sexists but misogynists: men who truly feel wronged by women and wish to retaliate.
60% are perfectly stand-up men who wouldn't do a bit of harm
Now the trick is that whenever the sexist and misogynists form a group where they have a significant majority, the closet sexists will give the misogynists a platform to damage women.
Meanwhile the other 60% sees nothing but 95% of perfectly respectful men who would do no harm against women and can't even imagine something like that happening in their company.
35% or so of geeks are closet sexists in reform: aware that their belief systems are wrong / socially unacceptable and trying to change.
5% or so aren't sexists but misogynists: men who truly feel wronged by women and wish to retaliate.
60% are perfectly stand-up men who wouldn't do a bit of harm
Now the trick is that whenever the sexist and misogynists form a group where they have a significant majority, the closet sexists will give the misogynists a platform to damage women.
Meanwhile the other 60% sees nothing but 95% of perfectly respectful men who would do no harm against women and can't even imagine something like that happening in their company.