I don't think he's smart at all with his political ideology, check his manifesto again...

https://web.cs.ucdavis.edu/~rogaway/classes/188/materials/Industrial%20Society%20and%20Its%20Future.pdf

Here's one of his quotes:

"Leftists tend to hate anything that has an image of being strong, good and successful. They hate America, they hate Western civilization, they hate white males, they hate rationality. The reasons that leftists give for hating the West, etc. clearly do not correspond with their real motives"

Remind you again of someone, in fact, someone used his ideology for mass shooting (Anders Breivik)

Also, we support critically actually-existing socialist countries, to which he later says something on how we exaggerate the faults and assault of the Western world upon the third world while, at best, begrudgingly acknowledging our faults, which is self-projection, considering the right wingers have consistently whined about 100 million dead nowadays

In fact, one of his ideology's core tenet is full-out anti-leftism and he talks in great length about its threat to this ideology

"To avoid this, a movement that exalts nature and opposes technology must take a resolutely anti-leftist stance and must avoid all collaboration with leftists. Leftism is in the long run inconsistent with wild nature, with human freedom and with the elimination of modern technology. Leftism is collectivist; it seeks to bind together the entire world (both nature and the human race) into a unified whole. But this implies management of nature and of human life by organized society, and it requires advanced technology. You can’t have a united world without rapid transportation and communication, you can’t make all people love one another without sophisticated psychological techniques, you can’t have a “planned society” without the necessary technological base"

Meanwhile, he just criticizes conservatives as slight hypocrites

"The conservatives are fools: They whine about the decay of traditional values, yet they enthusiastically support technological progress and economic growth."

If you want to see a better analysis and solution to saving the environment from ourselves, read these docs:

https://static1.squarespace.com/static/59bc0e610abd04bd1e067ccc/t/60642e4f3bd29a1c5bb36e31/1617178208144/Hickel+et+al+-+Plunder+in+the+post-colonial+era.pdf

https://www.sciencedirect.com/science/article/pii/S095937802200005X

https://www.sciencedirect.com/science/article/pii/S0305750X22002169

https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(20)30196-0/fulltext

https://www.youtube.com/@OurChangingClimate

In short, this guy was your regular cottagecore libertarian who is anti-technology and wants to live in a fully-deindustrialized world, regardless of its costs on humanity, let alone on our carbon footprint on the planet, which will stay there for a long time and probably increase a bit after the destruction...