First of all, being a misinformed voter and being brainwashed are not the same thing.
Secondly, that conclusion is complete bullshit.Your entire position is that a candidate must have a position you strongly disagree with and that's a faulty starting point.
My previous post explains elaborates even further.
However, even if that wasn't the case, then guess what? Big freakin' deal. If I am familiar with McCain's policies on the issues I care about and prefer Obama's, then I vote for Obama. Even if I don't bother to learn any of the other issues, it remains just a vote for president, not my new lord and savior.