I always imagined eco-fascism more as an authoritarian government mandating the arguably necessary individual choices that people just won't make on their own.
- You will be forced out of the suburbs and into an urban broom closet
- Your cars will be seized and scrapped
- You will not eat red meat
- You will eat the bugmeal
- etc.
Instead of the flimsiest, most insincere excuse for normal ethno-political-motivated fascism. But I guess that's what it would devolve into in practice.