I think this is a very fair analysis. Kaczynski definitely put his finger on something fundamental about the impact of technology on society. Among his fans are left-wing anarcho-primitivists as well as right wing eco-fascists and while they have fundamentally different views of tribalism and identity there's a lot of overlap between them, and it's not unknown to see people in one group drift into the other.

Kaczynski has also continued to write while in prison and his work is thought-provoking notwithstanding the paradoxes involved (eg how technology has facilitated the spread of his anti-technological ideas). His views don't fit neatly into any political category.