Libertarians and immigration

It has long been a source of consternation that the main position of the Libertarian Party is a pro-immigration one.  Typically we find open-border libertarians defending their position using arguments of principle.  For example, a libertarian blogger by the name of Jon Smith lists five reasons why he is in favor of open borders.  Without going into too much detail, his arguments are basically these:
1)  All people are born equal and we have no right to prevent any individual from moving to a place which offers more liberty than where he came from.   Furthermore, those who value security over freedom deserve neither.  Restricting the movement of individuals curtails their liberty and this is in the name of security.  This being the case, we have sacrificed liberty for security and so we deserve neither.
2) Our nation was founded by immigrants and immigration has brought us our greatness – so it makes no sense to restrict the thing that has made us great.
3) Immigrants, if not for the perverse effects of government welfare, bring economic benefit.
4) If I wished to move to a better country (because it is more free), I would do so whether it was legal or not.  So the Golden Rule dictates that I offer the same benefit to others.
5) Government has too much power as it is.  To grant them the power to choose who their citizens are, by way of enforcing a border, is giving them too much power.
Then there’s the case of Ross Penyon, who showed up at an anti SB1070 rally to support the invasion of the U.S. and to preach libertarianism to the swarthy primitives – who were polite and receptive (so he says) much as their ancestors were receptive to white missionaries preaching Christianity.  But I do not hold out much hope that Hispanics will embrace libertarianism as enthusiastically as they did Christianity; libertarianism lacks the persuasive powers of superior arms and bribes.
Penyon writes:

We outlined the nonaggression principle for those we spoke to and summarized the idea that as long as one is being peaceful one should be left alone. We stated that it doesn’t matter what color, ethnicity, region of origin, or any other secondary characteristic one possesses, but that purely by being nonaggressive, individuals should be free to make choices for themselves on where to live and who to voluntarily associate with. We handed out thousands of fliers on this message and generally received a very pleasant welcome.

It seems to me that the common thread, between Smith and Penyon is that they champion the rights of individuals only selectively.  In fact, they don’t seem to grasp that just as an individual is part of his nation, so too is the nation a part of the individual.  By destroying the nation, you are harming the individual.  Smith seems to have an inkling of the dangers of mass immigration:

I certainly understand that a large and sudden change in the number and culture of voters could be a risk to our republic, I submit that we have made it through that before, during the rapid immigration of the 1800s, and we can survive it again.

That Smith does not recognize the differences between the immigration of the 1800’s and what we have today I can only attribute to ignorance or perhaps the naivety of youth.
When convenient to his argument, Smith does recognize the concept of “nation”.  He writes:

times of greatest growth and prosperity in this country were tied to policies of the past where freedom was far greater. They recognize that mistakes were made, but that overall, wherever the principles of freedom were applied, we were propelled towards greatness. Most, however, fail to acknowledge the effect of our open borders during that time. Obviously that was one of the keys to our greatness, we are a nation proudly comprised almost entirely of immigrants.

Of course, he neglects to explain what he means by “our” and “this country”.  Perhaps there is some sort of magical quality to the soil or special spores that waft through the air.  Or maybe the water is blessed.  We are left to guess – but my guess is that he has not given it much thought.
With libertarians like Smith and Penyon, so eager to destroy individuals in the name of individuality, who needs statists?  A society without a specific culture (i.e. a “multicultural” one) is to a nation what a feral child is to a normal adult.

Feral children ought to be an excellent source of evidence in the continuing nature-nurture debate. Feral children cannot walk, talk, or socialise: they cannot show empathy with others. Indeed, these poor creatures are so apparently sub-human that Linnaeus classified them as distinct from home sapiens.

A case can be made that any society that lacks a specific tradition, culture, language etc. is not a truly human society but rather a dysfunctional assortment of individuals.  To call it a “nation” is a wild inaccuracy.  Any consensual arrangements they may have, and any peace they may enjoy, is only a temporary lull in hostilities or some sort of mass hypnosis brought on by an overabundance of material wealth.
It is no wonder that non-white nations are overwhelming us; whites had given up their cultures, having imbibed the poison cup of hedonism and decadence.  Arabs, Mexicans, Chinese and Pakistanis still possess their cultures.  Now they feed on the rotting carcass of the West.  The masses of the West believe that their latest fashions, celebrities, pop music and T.V. shows can replace a genuine culture so they invite the brown masses to join them in their revelry.  Many are attracted to this superficial proxy-culture.  After all, a rotting corpse smells sweet – in a certain way.  A rotting corpse can last 40 or 50 years before it becomes dry bones.  So too will it be with the acculturated West.  When the flesh is depleted, the various insects will consume each other for sustenance.  Those who are not acculturated must distance themselves from the decaying body or they too will rot.
The writhing mass of stinking leftists tries to prevent us from leaving.  It clutches us with its bony hands and smears its slimy juices on our skins.  Its jaw hanging by sparse sinew, it gargles in its zombie voice…
Don’t leave us!  You cannot go.
It’s illegal you see, come celebrate with me.
Celebrate the maggots and the larvae,
They’re so sweet – and smart, just like you and me.
What’s the matter?  Don’t you like diversity?