If it was possible to "educate" the masses, then it would have been done by now.
It is possible and it will need to happen if Dr. Paul has any chance, but you're definitely right about the first impressions.
It's important to establish credibility with people by talking to them about issues they already understand. That's not going to be enough to sway them, though, because they already have "mainstream" candidate that will tell them what they want to hear. So the next step is to build on the rapport and slowly branch into the education process. The trick is to do so without coming off as condescending.