The only people fitting both categories at once would have to be in favour of a very very quick de-growth/economic contraction and return to the lifestyle that

The only people fitting both categories at once would have to be in favour of a very very quick de-growth/economic contraction and return to the lifestyle that was ubiquitous a couple centuries ago: no fossil fuels is pretty much a show-stopper for modern civilization. That's a position that can be argued for and defended while being entirely coherent though (although it's not one that I'm particularly thrilled to run towards).