Affiliate Marketing Secrets

Santorum: True I voted for planned parenthood and increases in debt ceiling, but that was before. Now I am the true conservative, I will ban contraception for workers who work at certain institutions and their affiliates.
Newt: I was the speaker of the House when we repeatedly balanced the budget and reformed welfare. Hence, I am the true conservative.
Romney: I was for Massachusetts universal Healthcare, but I oppose the Affordable Healthcare Act and will repeal it, therefore, that makes me a true conservative.
Ron Paul: Santorum is a fake and not a true conservative.

I consider myself a Republican because of the % of my views, but im very open-minded when it comes to politics. Also im 18 years of age, so please understand my grammar may seem a little “funny” to the older crowd haha.
Anyways, Something i dont understand is why is it when We all voted to have it so when you went to a official ballot, You could not see what party affiliation the Prop, or Person running was affiliated with. Now, my question is why were the democrats so upset with this? I did research and heard the head of the Democrat Party (speaker of the house) and many other democrat leaders say that “We have to have the Party Affiliation down there because the democrat voters need the guidance.”
So my question is why would they say this? Why not let people vote for what they believe in. And ive been told by a Republican, And read this carefully so you do not misunderstand, He said that More republicans do their research Than democrats. Now thats not saying that Democrats dont do their research because PLENTY do. But meaning the Middle-class less educated ones dont really do the research and just go to the ballott and just vote “democrat”. I dont agree with this at all, and im also confused why the democrat leaders Would say this about democratic voters, because it seems like a insult to the democratic voters. Just looking for responses