" But in general I mistrust men I don’t know. I just don’t have confidence in them."
Although most women are raped by someone they know, enough women are harmed by men they don't know to make the author's statement ring true. No, not all men etc etc, but we never know which one it will be.
Ditto in the workplace, in a family setting, in a church setting - the men who harm women and children can sometimes be so unexpected that it turns their victims into the offenders. We've all heard about it - How can you ruin his life? You'll split the family apart if you accuse him. Victim-reversal.
So while we don't hate all men, it's a fair enough comment to say we hate men because of what continues to happen to us.