Sorry, but this sounds to me very much like a "conspiracy theory". The world is full of radical organizations who believe that they should isolate themselves in order to protect a way of life that they see disappearing. They often form "compounds" where members live together, set apart from the outside world. I am reminded, sadly, of the Branch Davidians who came to notoriety in the Waco, TX massacre.
Since Jesus has told us that “But about that day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father." (Matthew 24:36 and Mark 13:32), I do not believe that anyone has that kind of insider information. A "Christian Refuge" is needed in today's world, but not necessarily for "end time" reasons. A place where Christian refugees could go to escape persecution from other religions would be very welcome. But to "hole up" waiting for the end to come, in my opinion, is not what Christians are called to do. I believe that we should be working hard to bring more people under the saving grace of Jesus Christ.