Bill Walker over at LewRockwell.com nails it, as he takes on the economic, cultural and other arguments for leviathan to"do something" about illegal immigration:

Libertarians should have learned by now to be a little suspicious when politicians offer to solve our problems with the use of minefields and secret police. Especially when it’s the same politicians who created the problems in the first place.

We laugh at the stupidity of our ancestors, who sincerely believed that Irish were all lazy drunks, Jews had low IQs, Chinese could not be doctors, etc. We now know that Irish are very productive drunks, Jews have inherently high IQs (the fact that their mothers make them study hard can’t have anything to do with it, of course), and only Chinese or Indians can be doctors or scientists (math courses are too much work for white students). However, as with any other area of life, these things are more accurately discovered by market processes rather than by a large secret police bureaucracy.

There are two legitimate worries about immigration. One is that the Mexican culture will produce millions who will vote for more government. This is a little funny, because it wasn’t illegal immigrants who voted us into socialism; it was our own English-speaking great-grandfathers who voted for FDR. Mexicans don’t even control their OWN country’s policies; Mexican (or any Third World nation’s) politics is always dominated by the faction that gets the most US foreign aid.

I highly recommend that everyone read the whole thing.