There is a bottom-line reason for the extreme anti-Hillary vitriol coming from the Right. Because the Tea Party has succeeded in divesting the Republican Party of moderation, they now have no one to run for President other than corporate shills who are blatantly contemptuous and scapegoating of the non-rich. People are increasingly recognizing that the Republican party is bought & paid for by the ultra-rich, and is uncaring of anyone else.
The Right is fearful that in a Presidential campaign, candidate Hillary will make mincemeat of a far-Right opponent. So they are practicing feverish and orchestrated attacks of personal destruction against her. The Benghazi farce is the Right grasping at straws to discredit her. Look to them bring up Lewinsky. They will contort every situation to make Hillary look bad. As the Right has for years used incipient racism against Obama, so too will they unceasingly employ misogynistic innuendo against Hillary. They will be relentless in fomenting fear and hatred to take her down.
It’s going to be a bumpy, unclean ride.