Everyone's so "anyone but Trump" and came to the conclusion that Hillary was the best one to accomplish that. What if that's not the case? Hillary isn't exactly a lock for anything (like what happened in 2008, despite everything in 2007). What if Sanders was the one, but everyone was just too blinded by this "unelectibility" narrative and ignored the fact that he's potentially a better candidate?
And if Sanders fans are going to be blamed for whatever bad happens (IF something bad happens), then I don't see why Hillary fans can't be blamed for sticking with a wrong decision, despite a better one being available. Me personally, I'm not blaming anyone for anything, but this blame game is a two-way street.