They are already sure that they are doing the right thing.
There needs to be more Hillary FReeps, not less. It's the only way to show that not everyone agrees with her. Otherwise all you get are the, "I loooove Hillary. She'll just be the greatest president since George Washington!" comments.
If that's all you hear and never hear about anyone not liking her then a lot of the easily swayed swing vote is going to go her way.