The "Amish" or Quakers, Shakers and Mennonites have been exempt for a few things for centuries.
How or why they are is beyond me, because some have electricity, others don't...some pay tax, others don't.
Now as far as being survivalists'....
They are just living simply.
No modern conveniences.
It's their religious freedom.
Can they survive if SHTF? Sure.
They have lived this long without assistance...I'm sure they will live longer.
As far as starting a religious group and trying to "Be like the Amish"...well...
That might be a little difficult.
I believe there is more red tape once you accept your citizenship.
Once you pay taxes, file for you SSN, or accept gov't assistance.
The problem I see is this:
Would you really give up you computer?
How about your air conditioning? I doubt it.
You going to make clothing and be a farmer? Probably not.
You want to ride in buggies and have no car? Yeeeeah right.
I highly doubt anyone in here would truly enjoy working that hard.
Especially if you give up your "American dream".
You won't have any luxuries...no conveniences.
Think hard about that idea. Then...
Think about the harsh reality those people are used too.
Modern society is spoiled.
To the hilt.
They are not.
Plus the last time a group tried this they all drank some Kool-aid.
Or got raided by the ATF.