Zid: "Copyright 1937... That means WWII hadn't started yet but the JWs were being severely persecuted by the Nazis at this point??"
There is a satanic ritual called "Revelation of Method".
What this means is that *They* disclose what they are going to do prior to taking the action.
Since the verbal description of JW persecution precedes the event, one might come to the conclusion that Zions watchtower was in the know beforehand.
I have wondered, where did the Nazi's get the names and addresses of the JWs in order to go pick them up. Did WT congregations keep detailed info on everyone back then, too?