What's to marginalize? Their social platform is even more insane than Democrats. Anyone that follows the "If it feels good do it" Libertarian Party isn't even close to acknowledging the laws of God. While conservatives and Libertarians (note the Big L, as there is little to no difference between what they call Big L and little l L/libertarians) might be joining forces in the Tea Party movement for economic reasons, our social policies are eventually bound to clash.
I'll continue to spread the truth; if Libertarians want to jump on board, great, if not, they too are the enemy of our nation that was founded on the principles of Christianity.
There are as many flavors of libertarians as there are types of conservatives. There are Christian libertarians, objectivist libertarians, constituional libertarians, dopertarians, Kill-the-Fed libertarians, official Libertarians and libertine libertarians to name a few.
As one that has offered critical comment to those espousing that tradition over the years, I can say you might find many you hold common ground with if you are a typical conservative.
The rationalism of an ideologue libertarian is a good part of the seperation and it often is expressed in athesitic rhetoric — but there are pricipled beleivers here that describe themselves as libertarian. Likewise, there are agnostic or other flavors of conservatives that I can likewise find common ground with if their morality falls into the “Enduring Moral Order” class and stays away from situational ethics.