For what it's worth, I perceived the article as more affectionate than offensive when I initially read it. This may have something to do with full piece vs. excerpts, so I'd recommend reading the full piece (which isn't that much longer) first if you care.
I read just the excerpts, and I still thought that it came off as affectionate.
Cover title: “Power and paranoia in Silicon Valley”; article title: “Come with us if you want to live: Among the apocalyptic libertarians of Silicon Valley” (mirrors: 1, 2, 3), by Sam Frank; Harper’s Magazine, January 2015, pg26-36 (~8500 words). The beginning/ending are focused on Ethereum and Vitalik Buterin, so I'll excerpt the LW/MIRI/CFAR-focused middle:
Pointer thanks to /u/Vulture.