I'm just viewing it like this: I prefer Bernie's policies despite pragmatically supporting Hillary as the more likely to win GE candidate, and his supporters are good Democrats and Americans. But I simultaneously hope that this entire primary season functions as a very tough lesson for these same idealists, because idealism really doesn't get you much. Even on the occasion a perfect storm brews and that idealism sweeps someone into office (not gonna happen here), you have to figure out how to pass legislation. You have to compromise your values somewhere to get something passed, first. Second, before that even happens, you have to fix the gerrymandered system, something that can't even begin to happen until after 2020 earliest. Then we're back to the illusion of these political figures and if any of them could actually even be the transformational figures these campaigns keep claiming.
American politics for many many many many generations has been the story of slow, incremental change adding up to big things, and seizing on opportunities when they arise to best advance your agenda. Now was the wrong time for Bernie for numerous reasons. But it's a good time for people to understand that merely hoping for something isn't likely to make it occur. You also need to understand how to work the system in your favor.