Libertarian icon Lew Rockwell - purported ghostwriter of some of the Ron Paul newsletters - supposedly spoke about his views on immigration on a radio program of some kind: bkmarcus.com/blog/2006/01/lew-rockwell-on-immigration.html I'm going to assume that the transcript is accurate and that those reflect his current views on the matter, but he might have other views or he might have changed his mind since then. In any case:

1. Rockwell discusses intentional demographic change beginning in 1965 (thanks to Teddy Kennedy), but forgot to discuss the fact that massive immigration = political power. And, that means more power for the far-left and the Mexican government. Neither of those are libertarian, yet Rockwell and most other "libertarians" would... give them more political power.

2. The vast majority of Americans will always oppose illegal immigration and/or massive immigration. By encouraging those, "libertarians" encourage a crackdown, leading to support for more government intervention. If libertarians instead opposed illegal activity and supported our completely rational laws, there would be less government intervention, not more.

3. Perhaps Rockwell could tell us how we could do mass deportations if we absolutely, positively had to. If "libertarians" try to think that through, they'll see that we've been invaded and settled, something that the Constitution says we should be defended against.

Rockwell and most other "libertarians" really need to think this subject through in more depth.