Virtually no one has a strong, context-neutral opinion on whether a candidate who enters the convention with a plurality of delegates should automatically get the nomination *no matter how small that plurality is.*
In a world where Mike Bloomberg got 30% of the vote, Bernie got 28%, and Warren got 23%, very few Sanders supporters would denounce the idea of Warren delegates putting Bernie over the top on a 2nd ballot as an affront to democracy.
The stakes of political conflict are too high -- and the theory of procedural justice in this circumstance too arbitrary -- for anyone to prioritize principle over outcome. (Fortunately, Bernie appears on track to win a large plurality, so this prob won't matter).
(This said, I think there are plenty of facially plausible arguments for it being more democratically legitimate to throw a close contest to the candidate funded by small-dollar donors rather than his own personal fortune or whathaveyou. But that's obvi a different claim)
