This is one I would love to see busted.
JW were not the only ones to get a purple triangle in the Nazi camps. I bet they were not even the majority of the ones to receive them.
The purple triangle was a Nazi concentration camp badge used by the Nazis to identify several un-orthodox religious groups known as "Bibelforscher". [1] Among these were Jehovah's Witnesses, a few members of Witness splinter groups, and members of the Adventist, Baptist, and New Apostolic movements. [2]
This fact is lost on a lot of people because of the JW lying about how much the nazies hated them for not serving in the army.