Cahn is a born again Christian. He believes Jesus is the Messiah, and is an evangelical. His ministry has nothing to do with late Judaism, new Judaism, post-biblical Judaism, or any other interpretation you wish to assign, including mysticism.
I’ve read his book “The Mystery of the Shemitah” and it fits with other reasons for an economic collapse in Sept/Oct or close to those months. I hope it doesn’t happen but I don’t have normalcy bias so I know it CAN happen.
If he is a Christian, then why does he call himself Rabbi? Rabbis are Jewish, not Christian. I’m not worried about September; There have been many doomsayers in the past who were proven wrong. This guy sounds like just another one.