that is one that I occasionally struggle with. I am fairly liberal but I find the absolutist attitudes that many libertarians have to be naive and often repugnant. I don't think it's a stretch at all to place them in the same bucket as those other groups. They all have taken simple defensible ideas to extremes and tend to offer no compromises.
Well, you could order those groups by death toll? I'm not aware of Ayn Rand-style Libertarianism killing people.
Opposition to building codes? vaccination? pretty much any organized effort to make society safer (or avoid societal catastrophe)?
Libertarianism is pretty much "the tragedy of the commons" as a political ideal.
The US healthcare system definitely leads to more death than other developed nations, and the arguments against fixing it are generally Randian in nature.
As St. Randall of Munroe has put it: I had a hard time with Ayn Rand because I found myself enthusiastically agreeing with the first 90% of every sentence, but getting lost at 'therefore, be a huge asshole to everyone'.