Really bad take. It would be like saying Republicans support the Ukraine war and CR instead of budgets and increases in federal spending. There are many Libertarians who are open border and there are many who are not. The smart ones are not.
If you only listen to establishment Libertarians like CATO or Reason, you would think that open borders is the only libertarian position but it is not. You would be similarly uninformed if you listened to establishment Republican sources like Fox News to get the complete opinion of all of the Republicans.
Check out these guys...
Hans Herman Hoppe
Ludwig Von Mises
Murray Rothbard
Dave Smith
We are familiar with the shape-shifting libertarians.
I posted their party’s firm position on immigration, and I also mentioned their take on pedophilia and NAMBLA to date.