Sanders supporters like myself want to see a more progressive Democratic candidate and Party. Some will be content to see Clinton adopt a few positions of Sanders at the convention; others will not.
And I want to be rich and handsome kid, but life is a bitch.
In all fairness, Bernie voters compromise a significant part of the primary electorate and will be needed in GE. They should be given a consideration relative to their importance.
Of course that means a need for Sanders to embrace the nominee, but I'm sure it will happen before the convention. Otherwise, there would indeed be no choice but to shun him.