"Compare either or both of them to say, the Libertarian party and you'll see what actual differences are."
Yes, the first two look sane. Libertarians are the flip side of Marxists. Nice dorm-room wankfests, but utter train wrecks in the real world.
The point was, that's a political party with actual differences from the ruling factions. They don't disagree on how to implement the same philosophy like the Democrats and Republicans. They disagree about the fundamental philosophy itself.
Also, be aware that there is a serious effort to misinform people about what libertarianism is. The effort is to equate all libertarian thought with anarcho-capitalism. This is intentional. As I said in a post below, when political types cannot logically argue against something, they do their best to portray its supporters as evil and heartless. To give an example, only those who can afford their own armed guards would have police protection under anarcho-capitalism.
I am, for the most part, a libertarian. I want a government that collects taxes. I want that government to regulate industries and stock markets, with the goal of eliminating force and fraud. I want there to be tax-funded firefighters and police. I want there to be something like an FDA, but its sole purpose would be to make sure that no fraud takes place (if you buy a container claiming to have X drug, it actually does contain pharmaceutically pure X drug). I otherwise believe all drugs should be legal with only crimes (such as DUI) being punished. I want all activities confined to consenting adults to be legal, but I want it to be a crime the second anyone who is not an adult or does not consent is affected by the activity. I want almost all of a citizens' experience of government to come from state and local levels, with only issues like national defense and interstate roads handled by the feds.
This "utter train wreck" is, as a poster below pointed out, extremely close to classical liberalism. This same "utter train wreck" is what the USA had during its early history. If that's a train wreck, please derail me.