It doesn't seem particularly coherent to me for a few reasons. To draw a hard line between human activity/habitat and nature seems artificial. A human settlement is not so different from a beaver dam of ant colony in many ways. The idea especially in the US that there is some pre-colonial unspoiled nature that we could preserve or return to seems historically ignorant. Native Americans were managing the land with fire in much of North America for at least 15k years and the whole place was a giant game park with archipelagos of agriculture and settlements. Early settlers remarked that upon arrival they could ride a horse through New England forests at a full gallop, which wouldn't be possible in a primeval/unmanaged forest. So redefining society away form managing nature would be a radical departure and it unclear what the end goal would even be. There is nothing to roll the clock back to really anywhere in the world, and even if you "re-wild" a lot of the continent it's not clear what you would get, it certainly wouldn't resemble the Americas of 1491 ecologically.

Mostly these folks seem like neo-malthusians who just hate people and civilization.

I'm all for increasing bio-diversity, pulling carbon out of the air, and cleaning up waste but I don't think any of that requires us to use drastically less energy. If anything we should aim to make energy so clean and cheap that those other things become cheap and easy.