That article is straight dog shit. The author is basically saying that Ted Kaczynski is the stylistic precursor to a particular brand of white nationalist terrorism because he 1) killed people and 2) had a manifesto. That’s it. The article even states:

Effectively, Tarrant followed Kaczynski’s eco-terrorism but reinterpreted it to employ white supremacy and Islamophobia.

Brenton Tarrant was the Christ Church Shooter. He hated non-whites and Muslims. Saying he “followed [Kaczynski’s] eco-terrorism but reinterpreted it to employ white supremacy” is, at best, misleading, and at worst a bald-faced lie. Tarrant had virtually no ideological connection with Kaczynski. He described himself as an eco-facsist because he was a dimwitted 4chan kid who blamed overpopulation on Muslims. For all of his flaws, Kaczynski was an incredibly intelligent and well-educated anarchist and would have despised Tarrant. He didn’t “reinterpret ecoterrorism as white nationalism.” He just labeled himself something he thought sounded cool without understanding it.