Orphan Crow is very correct. If I ever get a time, I would love to research archives in Prague related to collaboration of JWs with the Nazi government. During the Protectorate of Bohemia and Moravia, some JWs went head on against German's occupational force and were executed. Some of these people died for their own stupidity to parish as a martyr. In 1942 there was a martial law in Protectorate, which required everyone to have identification. Failure to do so resulted immediate death. Some JWs willingly destroyed their IDs in the peak of the Heydrich's terror and did field service to be caught, arrested, and executed on the spot.
After the war, there were retribution courts dealing with WWII collaboration. Some JWs were brought in to the court to face the accusation to be compliant with Nazi regime. While I am not aware that any of the JWs were condemned by the court, the accusations in postwar Czechoslovakia indeed existed. I heard about them in 1970's/1980's. However, WWII collaboration of JWs there is not well studied, unlike well documented collaboration of JWs under Stalin regimes. If there was collaboration with commies, its is certain there was collaboration with Nazis. I had personally searched some names of JWs in Czechoslovak courts for communist collaboration and I had seen names that I recognized.
Any case, when the WWII ended, many JWs were seen working as servants for Nazi leadership in occupied Czechoslovakia. Lina Heydrich had entire pack of them brought from Germany who lived in idle luxury in chateau outside Prague. I have also encountered information that Carola Blazek Frank, wife of the Bohemian Reichprotector had JWs who were Czech and German origin on her chateau (Czech sources are ambiguous between distinguishing Lina and Carola JW pack, and I could not find definitive proof) . While the German JWs were expelled to Germany, there was an initiation to investigate the conducts of domestic Bohemian JWs who were serving local Nazi leaders. After the war JWs got a free pass in the courts by pointing out that JW and Bible Students were prosecuted by the Nazi Regime and thus they were victim instead compliant.