This has mystified me for some time, too, and I think I finally figured it out in a comment on an earlier thread today, to wit:
Hillary has been the classic uppity woman ever since her days as Arkansas’ First Lady, and they want to see her brought down, humbled, made to wear sackcloth and ashes — or to have her head shaved and do the Walk of Shame, complete with the little bell and the dollops of excrement and the nun chanting behind her.
Seeking a rational cause for this is beside the point, and will never explain their purely visceral reaction when brought face to face with a free woman, a woman who is no one’s object and no one’s “10” — something that seems completely normal to us, but drives them batshit insane.