"If the system succeeds in acquiring sufficient control over human behavior quickly enough, it will probably survive. Otherwise it will break down. We think the issue will most likely be resolved within the next several decades, say forty to a hundred years." --Industrial Society and Its Future, paragraph 162.
Further, your statement implies an assumption which is not correct. The implication you're making is that because things have so far remain unchanged, Kaczynski's actions were therefore unjustified and/or his writings were not true. This does not follow. Just because an anti-tech revolutionary movement has not (yet) materialized and the industrial system is not (yet) under serious revolutionary threat does not invalidate the truth of Kaczynski's ideas or the validity of Kaczynski's actions. You would not be justified in implying this any more than you would be justified in claiming Galileo had no effect or was wrong because he was placed under house arrest and almost nobody believed him (at the time).