It’s really unfortunate to see such an unchallenged application of the label “libertarian” here. Put aside your own feelings for a moment.
Highlighting any connection between libertarianism with the alt-right, white supremacy, or anti-government militias seems as disingenuous as the superficial connection between atheism and fascist communism.
In either case, does the ideology overlap in convenient areas (to the negative ideologies), yes, probably. It’s easier to command absolute fealty of the state without god in the way. It’s easier to preach radical, violent white supremacist anarcho-capitalism with the state out of the picture. But does libertarianism espouse, promote, or a natural evolution that ends in The Boogaloo? Absolutely not, and it’s ridiculous for a journalist not to ask and answer those questions.