Sadly most people seem not interested in the psychological or sociological motivation of those abusers. There is always something that triggers abuse (no, I am not saying that it must be something the victim did). I wish we would investigate into that and help people stay clear of the psychopaths that way.
http://seriouspony.com/trouble-at-the-koolaid-point/
"I now believe the most dangerous time for a woman with online visibility is the point at which others are seen to be listening, “following”, “liking”, “favoriting”, retweeting. In other words, the point at which her readers have (in the troll’s mind) “drunk the Koolaid”. Apparently, that just can’t be allowed."
Read the whole thing, it's heartbreaking and eyeopening. It also involves some of the same people that attacked the author of the current post.
So whatever these two woman did to "incite" this harassment was shared by at least two kinda-succesful woman in tech.