This is the kind of lunatic thinking I have come to expect from libertarians such as yourself. Open borders? Quotaless immigration? What do you think the enemies of America would do if this were so? In the real world of course (which is outside of realm of most libertarians), China could successfully wage war with America on the cheap by sending boatloads of their people to our shores with the expressed purpose of colonizing us or outright conquering large territories by their sheer numbers. Other countries in the Middle East, Mexico and elsewhere would no doubt seize on this opportunity and do the same. America would be reduced to a third world nation almost overnight with large ethnic blocks squatting on hunks of U.S. territories that would become de-facto possessions of the nations invading us. And as for your laughable "simultaneous rollback of government welfare" just tell that to the hordes of new immigrants when their population outnumbers American citizens either locally or nationally. I would think that the massive influx of illegal immigration from Mexico and all the problems this is creating especially in the Southwest would give you some insight into what would happen if America had no immigration laws or borders.
Limitless naivete continues to rule the day with you libertarians even in the post 9/11 world where just yesterday a Middle Eastern terrorist tried to blow up a plane headed for Miami. What to destroy America? Just open up our borders to everyone in the world. Perhaps this is your agenda.
Well, I guess you are the moron. After all, America's enemies have already had quotaless access to our borders for years under the incompetence of Democrats and Republicans. Heck, we have GW Bush assuring the arabs on a weekly basis that we won't bother them as they invade our country with no intent to make it their permanent home. Face it, America is already open to the world. The problem is that under your corrupted policy we only discriminate against the legal and desirable people who wish to flee oppression and become free, while the dregs and criminals enter the country illegally at will, and with no intention of becoming a permanent contributing member of our society and culture. Yep, you are the moron here, and a whining one at that.