Libertarians hate tariffs but you know what? Tariffs and duties are defined in the US Constitution, not the income tax! So absolutely the US Constitution should be followed - as written.
Anarcho capitalists definitely do believe in borders.
There’s virtually nothing libertarian about the federal government. You think libertarians are responsible for globalism?? LOL! Neither libertarians nor paleos nor constitutionalists support managed trade agreements. It would actually be the political left (including GOP) which is for globalism.
I think you have your definitions mixed up. Badly.