I'm impressed to hear that you don't have a problem with his ideas. I certainly do! I went into some detail about that, not long ago: https://aaron-m.com/2017/07/09/on-kaczynski
Perhaps I have failed to take your meaning here. But the trouble with an idea is that you can't kill it by excluding it from what we please ourselves to regard as polite discourse. Kaczynski isn't the only radical anarchoprimitivist in the world. Don't you think it might be a good idea to give food for thought to the next one who might be thinking about blowing people up?
https://mobile.nytimes.com/blogs/bits/2013/03/22/the-best-th...
I don't think it does much, to help his thesis gain traction, that he should argue it the way he seems to do. But that's his mistake to make, I suppose, and even he strongly disclaims the "blow shit up and kill people" part of Kaczynski's analysis - and that's the only part of his analysis which is genuinely original; Against His-Story, Against Leviathan, just off the top of my head, predates Kaczynski's publication by over a decade.
So I'm not sure that we really can add one otherwise obscure adjunct professor to one otherwise forgettable NYT opinion columnist and end up with meaningful uptake of anything that Kaczynski actually had to contribute, rather than simply an early attempt to find in anarchoprimitivism what value may be there to synthesize with the culture in which we live. A subtle distinction, I concede - but, I maintain, a worthy one nonetheless.
I cannot pretend to know what timwaagh thinks, but it seems overwhelmingly plausible to me that his comment communicates the view that Kaczynski's behavior turned irretrievably inexcusable at the point when he resorted to actual violence.