I suspect JWs have always taken that phrase to mean that all the Methodists and Baptists and other pagans will all be gone with the wind when Jehovah gets done destroying everyone but them. Everyone they didn't like will be gone. Everyone who is not a JW will be gone. But what if that is not what it really means?
Surprise! Look for the wicked and you will not find him.....that's why they are headed to their hidden underground bunkers.
No one will be able to find the evil ones when the SHTF! JWs will just be left flabbergasted and holding the bag wandering around in the desert when it comes to this NooLight.