I could have added that the behaviour of JWs during the Third Reich was also something that convinced me Jehovah’s Witnesses have the truth. The Nazi regime is as close to a laboratory test of who are true Christians as you could conceivably devise and JWs conducted themselves well when so many others did not. That’s not to deny that individuals of other religions showed courage or that some other small groups also took a stand against the regime, but it seems obvious that JWs stood out as a religious group that stood firm under extreme trial. - Silmboyfat
When I was a JW, I believed the same thing. However, after leaving the faith and visiting Auschwitz, I came to realize that Catholics and other Christians simply followed a different strategy. They lied to the Nazis and publicly supported them, all the while contributing to the resistance behind the scenes. As a result, around a million Catholics died fighting in the resistance. Like the JWs, many of them were sent to concentration camps.
Certainly, there were ugly cases where some Christians were full-blown Nazis, but JWs had their own traitors too. The only real difference was the numbers—there were many more Catholics, and therefore many more traitors and Nazi sympathizers, but the ratios were likely similar.
Looking back, I now find it immoral for JWs to claim they were the only true Christians through all of this, while ignoring the significant sacrifices made by other believers for the good of humanity. Their faith was put into action, and if there is a God, it would be unjust to overlook those sacrifices.
In short: While JWs certainly deserve recognition for their unwavering stance, it is equally important to acknowledge the sacrifices and alternative strategies of other religious groups, including Catholics and Protestants.