Matt's right that some Clinton supporters might be dissuaded if they knew some of her policy positions. So, yes, in some sense some of Clinton's support, as with the rest of the candidates, might be based on voter ignorance. But the point I'm trying to make is that there are a lot of people who really like Clinton. Maybe they don't agree with her on every issue, and maybe they would disagree with her more on issues if they actually knew more. But lots of people really respect Clinton. They admire her. They believe she would be a good president. They'd be more than happy to trust her with the job. It's that basic fact - plenty of people really like and respect Hillary Clinton - which I see left out of a lot of the online chatter about her campaign.
I'm not trying to make the case for Hillary Clinton, I'm just saying that there are plenty of people who would really like her to be president not simply because of name recognition or Clinton nostalgia. In other words, she has actual supporters.