I'm not saying that Paul now follows all of the libertarian platform
But they do not believe in closed borders
This might make you take a second look
http://www.lp.org/issues/immigration.shtml
The benefits of open immigration
America has always been a nation of immigrants. Thomas Jefferson emphasized this basic part of the American heritage, taking note of "the natural right which all men have of relinquishing the country in which birth or other accident may have thrown them, and seeking subsistence and happiness wheresoever they may be able, and hope to find them."
The Libertarian Party has long recognized the importance of allowing free and open immigration,
Studies also show that not only do immigrants not take jobs away from American workers, they also do not drive down wages. Numerous studies have demonstrated that increased immigration has little or no effect on the wages of most American workers, and may even increase wages at upper income levels
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There is a lot more but you get the message
this is like something right out of la raza's playbook