This is no different than the claims WT has made about Hitler's Nazi Germany.
WT claims that JWs were told they could not read the Bible or worship Jehovah, so they stood firm for "true worship" by choosing to go to concentration camps and/or be executed in order to not compromise their Christian faith.
WT's claim is patently false.
In the form a JW could sign to gain their freedom, no mention is made saying, or implying, that a JW could not read the Bible or worship god. The Nazis required a JW to disassociate themselves from the Watchtower Society only and the JW agreed to not promote WT teachings.