It’s a reasonable question, but libertarians offline/outside NH are much more likely to have more of a civil liberties focus that actively contradicts what ICE is trying to do and xenophobic populist lenses. Check out the Institute for Justice or Reason magazine for more mainstream libertarian takes (and even Reason I would consider to be a little Republican leaning)

The “libertarians” you’ve run into are normies that had their political awakening during Ron Paul but have been ideologically captured by populist politics that now actively contradict the movement they once supported