sfb: Wikipedia has the correct numbers from Detlef Garbe the leading expert on this topic. There were 20,000 JWs in Nazi Germany, 10,000 were imprisoned, 2000 of them in concentration camps, and around 1200 died in custody including 250 who were executed.
What those numbers don't reveal is that half of the JWs/BibleStudents that were arrested did sign the declaration to be released.
What you won't find in those numbers is the number of JWs who held positions of privilege during the war with SS members and their families. You won't find the accounts of the JWs who sat out the war in a posh camp as caretakers of Himmler's castle. You won't find the accounts of how JWs were released, by Heinrich Himmler the leader of the SS, on a handshake and considered partially free by war's end.
A Castle, Estates and Berry Picking: Personal Servants and Positions of Privilege
and you won't find the account of how Himmler had made an order in 1944 to relocate JWs to conquered territories:
In July 1944, Himmler ordered Ernst Kaltenbrunner, the head of the RSHA, to begin the exporting of the faith of the Jehovah's Witnesses to the occupied east.[39] Himmler considered the Jehovah's Witnesses of being frugal, hard-working, honest and fanatic in their pacifism, and that these traits were extremely desirable for the suppressed nations in the east
I understand the position of not denigrating the JWs and Bible Students who did suffer during WW2...but I also think it is important to set the record straight about what really went on with the JWs and the Nazis by the time the war was over.