I'm not sure why you think government is easier to oppose. Or what it has to do with the core principles of Libertarianism.
In any case, of cause, the reality is much more complicated, if there is a dispute over property rights or a form of coercion you go to court to decide who is right and who is wrong. Libertarianism is not anarchism.
At the same time, in spite of all the complications of the real world, there is a clear difference in ideology between libertarianism and social democracy, for example. And one can claim the difference stems from the core principle where the two worldviews differ in certain values.
Ah yes, the one form of coercion libertarians endorse - via the courts. I'm just not even going to address all the reasons that can't work and/or just changes the details of coercion. Others have done so, more or less eloquently, zillions of times. It always falls on intentionally deaf ears. Good day.
In any case, of cause, the reality is much more complicated, if there is a dispute over property rights or a form of coercion you go to court to decide who is right and who is wrong. Libertarianism is not anarchism. At the same time, in spite of all the complications of the real world, there is a clear difference in ideology between libertarianism and social democracy, for example. And one can claim the difference stems from the core principle where the two worldviews differ in certain values.