Why, shouldn't the fact that Hillary will lose and Sanders would win mean she should swallow her ambition to save the country? What is more important to her, her ego or the country?
Does this have to be stated, even rhetorically? Even Dems know the answer to that (just for any especially delusional Dems, that correct answer is quite obviously ego), it's why so many dislike Her even in an election year. It's the same reason why you hear so much head nodding mantra about Trump 'racist, misogynist, xenophobe, lions and tigers and bears oh my!'. Their chosen one is
so unappealing, they elected a zero experience guy the last time she ran whose sole qualifications were 1.) wasn't white, 2.) could read a teleprompter well, 3.) wasn't Billary, and this time, they need to vilify the opposition to take attention away from their own horrible candidate.
Bernie should have got up there tonight and demanded to be nominated. He would have had the will of the Dem (and Independent, and a good amount of Rep) people behind him, the Establishment-Dem would have looked even more crooked than they already are continuing on with Crooked Billary.