>Weirdly, only left wing people read him. But he's actually quite libertarian compatible.
There are quite a few on the Right that read Illich as well. He was, essentially, a communitarian anarchist. Some of his thought is well-received on the Right, particularly his critique of institutionalized education and medicine.
There's a heavily online right-wing presence that admires Ilich; of the people who could be described as "right-wing" I've seen that talk about Ilich, most are either hobby homesteaders or people with advanced CS/engineering degrees that read a lot of "online rationalist" work about a decade ago.
There are quite a few on the Right that read Illich as well. He was, essentially, a communitarian anarchist. Some of his thought is well-received on the Right, particularly his critique of institutionalized education and medicine.