Professor Walter Block has an excellent critique of the growing schism between left (Long) and right (Hoppe, Feser) libertarians. Concerning the right, Block points out Hoppe's assertion, "...conservatives today must be antistatist libertarians and equally important, ...libertarians must be conservatives." As such Hoppe has come out against open immigration and a banishment of homosexuals from polite society. I agree with the first part of Hoppe's statement, but concerning the second, I can't help sensing the fear that comes with dealing with such issues. It is easier to banish, to prohibit, ultimately to coerce. Much harder is it to convince with the possibility of failure, to convert, to love.
The Catholic libertarian need not fear immigration and homosexuality. Both are challenges (one is sinful, one is not) that lead to opportunities to bring us all closer to Christ. What the Catholic needs to understand about libertarianism is that it is a philosophy that does not seek to license immoral nor moral nonagressive activity beyond natural limits. It is only through the modern state that sins like homosexuality and other marital/sexual vices thrive and metastasize. The completely free market rooted in property, are far more effective moral masters. Catholics need to realize that libertarianism is a political philosophy that they need not compromise their faith to adhere to it. Likewise, it doesn't necessarily follow that all libertarians must be Catholic from a political standpoint. However, from a theological standpoint, we Catholics, whether libertarian or not, must pray for the conversion of all hearts to Christ's Gospel.
I think this Catholic 'conservative' stand for libertarianism can rightly be identified what Block calls 'plumb line' libertarianism.