Libertarian doesn't equal open borders, as that's a broad political spectrum.

Hell, even some anarcho-capitalists (like the late Murray Rothbard and Hans-Hermann Hoppe) are against open borders.

I think the point is like Musk, these people hardly refuse government subsidizes. You might argue they provide a service, they are not getting a handout, but it's still paid by the same taxes they want to get rid off at first place.

Libertarians are not universally against taxation or Government involvement at large, it's a pretty wide umbrella.

Musk can also be seen as a libertarian but he does advocate for social programmes like UBI which have to be provided through taxation.

Most libertarians I know are not universally against taxation, they are against double taxation and would prefer to tax corporation and consumption at higher rates rather than individual labor.

Libertarianism is primarily about the role of the government within the life of an individual and about maximizing the agency an individual holds over their own life; It doesn't mean that an ideal libertarian society would have no taxes; If anything most libertarians would rather pay higher local taxes to offset lower national taxation because they have more agency in determining on what and how their money is being spent on.

Libertarians don't want anarchy, they are fully aware that roads, schools, police, firefighters, EMT's the military and for most of them even hospitals and much more have to be publically funded, and the only way to do it is through taxation.

I wish your version of libertarian was more outspoken.

It's not my version; and I find more often than not is that people hear what they want to hear.

It's not about borders or immigration -- that is just this specific case. Palantir helps big government in a variety of ways which are incompatible with a libertarian worldview.

Says who? You can't go up to people and tell them what their views are. They get to decide.