This hatred of Hillary has existed for a while, and would exist regardless. The fact that some of these folks aren't listening to their own candidate is truly sad. It makes me believe that these particular Bernie fans (remember that a majority of us are already behind Hillary) never really supported Bernie because they liked him, but because they hated Hillary.
People have the right to their own minds and opinions. I don't blame them for not transitioning to Crooked Hillary after all of the shenanigans that have gone on with their candidate.
I'm sure you'd say the same thing about NeverTrumpers.