I've never seen her (or Bill) as a good Democrat, unless doing good does her some good.
Her agenda, which has now become undeniable post-NC and Indiana, shows what people have been saying about her since New Hamphsire.
She apparently made a decision, either consciously or sub-concisously, a long time ago, to either get the nomination or destroy Obama in the process.
She doesn't want a successful President Obama. She wants a Failed Nominee Obama, who would be snake bit for 2012. Hillary will then lead the charge against President McCain for four years, all while proclaiming, "I told you Obama was unelectable!"
Well, she's trying to make him unelectable. That's where she has become Hillary the Destroyer. She's not just saying she'd be a better president than he would be, that she's got better qualities, ideas, experience. That's of course what campaigns are all about.
She has consistently, as she's become more desperate, tried to make the case to superdelegates and voters that he is categorically not fit for the Democratic nomination, because he is categorically unsound to be president. She is back to the whole blatant use of racial divisiveness even now, when she's supposed to go softer, stating explicitly how he can't bring in "white people," etc.
She'll win or take him down with her.