Libertarians would let a billion Chinese come to the United States.
More importantly they would let a million members of IS come in
Although I have libertarian (constitutional) tendencies, in my circle of acquaintances, most who identify as libertarians are 1) atheists, 2) globalists and 3) completely lacking in empathy for others. One might say that many libertarians (Gary Johnson included) are globalist, atheist, sociopaths. I apologize in advance to any freepers who think of themselves as libertarians - just drawing an inference from the libertarians I know.
And Mexicans, and Muslims, anybody but white Europeans.