>>515089142 (OP)
For an ethno state you have to think long term. Decades and centuries. Few people have the ability to think that far ahead, few care about anything beyond their immediate horizon.
As I see it creating a physical ethno state in today's climate is nearly impossible. At the moment its just better to organize groups, establish a set of agreed upon principles, build connections and secure communications. If SHTF then you are already in a position to mobilize and coordinate action.
Crazy as it may sound I think religion is a perfect cover. But then we live in crazy times. I think something like what the Amish are doing is worth studying. Their life style and beliefs act as a practical barrier to outsiders, they are obviously successful in their enterprises and breeding like rabbits. If you could establish a recognized religion based on their model, but without the pacifism, then you could get on with establishing de facto ethno communities that fly under the radar. You might have to revise some of their ideas about technology, some Amish groups are very strict, others are more open to using it. Obviously you want to be able to take advantage of technology when it suits your aims.
The biggest hurdle is to avoid becoming a cult. You need sound principles, almost a shadow constitution, and a pragmatic approach to deal with any cult-like personalities or even being perceived as any sort of threat. You dont want situations like Waco or Ruby Ridge. Avoiding confrontation, remaining camouflaged, being quiet and unremarkable are your allies.
>Why the need for a religion?
Unfortunately some sort of overarching unifying umbrella is necessary. Region does a good job at providing that, particularly if its an offshoot of an already established religion and not some overtly nutjob belief. It helps exclude outsiders you dont want. It gives a veneer of respectability. It offers a plausible line of defense against interference from the outside. At least for the present.