and does not become sanctified by reasons of state if committed by the government. We believe that theft is theft and does not become legitimated because organized robbers call their theft "taxation." We believe that enslavement is enslavement even if the institution committing that act calls it "conscription." In short, the key to libertarian theory is that it makes no exceptions in its universal ethic for government."
"Libertarianism holds that the only proper role of violence is to defend person and property against violence, that any use of violence that goes beyond such just defense is itself aggressive, unjust, and criminal. Libertarianism, therefore, is a theory which states that everyone should be free of violent invasion, should be free to do as he sees fit, except invade the person or property of another. What a person does with his or her life is vital and important, but is simply irrelevant to libertarianism."
Murray Rothbard
This is a fantastic read, and I urge you to read it:
https://mises.org/library/myth-and-truth-about-libertarianism