Lets see.
She's scum. And worse, as her increasingly clumsy and unprepared campaign has revealed, she's not even terribly competent scum. The Clintons are hateful, vindictive people who never forget a slight, see personal betrayals everywhere, and treat those who don't support them as enemies to be destroyed.
The ends justify the means. Always. No matter how ruthless, how disingenuous, how intellectually dishonest, fraudulent, destructive, or counter-productive. She'll play a Republican for a news cycle, attacking from the right on whatever issue if it'll help her demolish the opposition. She'll throw the kitchen and the sink if she thinks it'll help her chances, no matter the damage it may cause the party. And its not like the ends are all that noble. I'm sure they rationalize the ends as being 'the best thing for America', but the best thing for America in their mind appears to be and ONLY appears to be a Clinton Presidency. Which is fair enough. But they also seem to have this impression that anything short of a Clinton Presidency and you may as well have Attila the Hun in office, cause they're all equally bad.
She attacks from the right when its politically convenient, even going so far as to dust off talk radio rhetoric when it suits her purposes. Sees former supporters following their conscience as 'Judas's'. Anyone who follows her campaign knows that she values loyalty over competence to a fault. Which anyone paying attention knows is one of the BIGGEST flaws (and scariest, most destructive ones) of our current President. As former supporter David Geffen noted, the Clintons lie with such comfortable ease. Big, small, necessary or otherwise. Bill could make up for this because he had the charisma to come off as sincere even when he wasn't. Hillary? Disingenuous and intellectually dishonest at nearly every turn. And that's when she's not flat out lying.
Or you can just go for the talk radio rhetoric of 'America hatin socialists!'. Its mindless, inaccurate, and stupid, but the right seems to eat that crap up.