That is nonsense, if everyone in the world can get on a plane and come to America legally and live better with better infrastructure and wealth and work and living conditions then hundreds of millions will flow in from everywhere, the immigration and birthrate would be beyond imagining, why struggle to work or run a taco stand in Asia or Africa or Latin America or the Middle East when you can do it in Houston or Minneapolis or Seattle or Wyoming without any immigration hassles, just come and go as you and your countrymen please.
One thing about libertarians is that a person has to ignore their fantasies, here is the 2008 party platform on abortion. It translates into “do what you want”
Abortion: 1.4 Abortion
Recognizing that abortion is a sensitive issue and that people can hold good-faith views on all sides, we believe that government should be kept out of the matter, leaving the question to each person for their conscientious consideration.
(sarc)Oh Heavens. We can't have hard working entrepreneurs coming to the US. What would the neighbors think...(/sarc) Did you even TRY to re-read that statement to make sure it didn't sound really stupid?
If ending Roe V Wade, government funding for abortion mills, and States being able to write their own statutes is "do what you want" free for all baby killing... Then you've completely gone around the bend.