There aren't as many Republicans that would vote for Hillary as you think there are. I'm assuming you're talking about the people who rabidly support LYIN' Ted, but that's not even 0.1% of his supporters (look at how few people give a shit about what Ben Shapiro has to say anymore). Republicans will support the Republican candidate, and Democrats will support the Democrat candidate no matter what. The question is about the independents.
If Bernie beats Hillary in pledged delegates but she ends up getting the nominations because of the corruption of the superdelegates, I can't imagine why anyone would vote for her. As the study shows, there's a sizeable portion of the people who support him who say they would never vote for Hillary. I'm perfectly fine with her getting the nomination if she wins fairly, but if it's because of corruption, I'd rather have ANYTHING else. I'd vote for Caligula's horse over Hillary in that case.
Likewise, if we get to the Republican convention with Trump leading in the delegate count, and the nomination is somehow stolen from him, I can't imagine his supporters would be too happy. I support Trump, and while I wouldn't ever vote Hillary because of other reasons, I wouldn't vote for the Republican candidate if they stole the nomination from Trump. I'd vote 3rd party. Maybe Independent or Green party.