The thing is, precisely the kind of people you would expect to be sexist -- blue-collar working-class types -- generally voted for her.
I admit she was on the receiving end of a lot of sexist remarks, but this was almost uniformly from lefty bloggers who hated her for getting in the way of their messiah's nomination (I recall one fellow denigrated her for not giving Bill enough nookie, causing him to make it with an intern and spurring all the problems Clinton faced in his last few years). They very clearly don't mean it anymore than they do when they call Geraldine Ferraro a racist. And the hatred for her preceded the sexist remarks, not vice-versa.