Great work!
I know it's discouraging. I became frustrated with the knee-jerk, rank and file masses of the Republican party, years ago. Just as there are still "yella dog Democrats," who would vote for a yellow dog before they'd vote for any Republican (the sentiment, if not the expression, goes back to the war between the states and the subsequent military occupation or "Reconstruction"), there is a relatively large segment of Republican voters, who unthinkingly adhere to the notion that anyone who approaches them in a uniform or a business suit is their friend, that any issue presented to them as "pro-military" or "pro-law-n-order" is for their own good, and that if the US doesn't unquestioning defend/promote the modern U.N.-created state of Israel uber alles, then God will turn the US into a pillar of salt (can't imagine whose lobby would promote that line of thinking).
Consequently, many Republicans have been functionally lobotomized, and will defend the status quo, so long as the status quo is believed to be the party platform; They are blind followers, and Hitler could not have asked for a more subservient, unquestioning, unthinking lot.
In truth, I don't know what percentage of the party these worker drones comprise, but it is substantial. Mostly, they're a waste of time; they're the ones who'll still be stoking the Titanic's furnaces, long after the last life-boat has departed.
There may also be the element of pro-establishment vs anti-establishment, in the success you've been having with one group over the other. Many Republicans have allowed themselves to be turned into useful idiots, defenders of the establishment (right or wrong), while many Democrats see themselves as reformers of the status quo, and critics of the existing order. When these Democrats elect someone to reform, but instead witness him perpetuate the established order, they feel betrayed. When they see the establishment ignoring, marginalizing, and attacking Ron Paul, they know the establishment is genuinely threatened by him.
In my experience, concentrating your efforts on truly undecided voters (whether current or future Republicans) is a much better investment of your energy and talent than butting your head against voter prejudice. Most important, though, is mobilization or follow-through: get ' em to the polls!
I have three, maybe four people switching their registration from democrat to vote for Paul in the primary but the republicans I know refuse to consider him. Its really getting frustrating. I'm coming to think that its because the Democrats are so disillusioned with Obama where as the republicans are blaming him for everything.