Queen Farasha
Sergeant Pancakebatter
You realize that to go against Hitler meant you and likely your whole family would be placed in danger, right? Many people were doing what they had to do.
And who was monitoring any dissenters? The people making threats and acting upon them were evil.
Everyone. If you tipped off the gestapo, good things tended to happen to you. It's like the evil twin of crimestoppers. Thus, you couldn't trust your neighbors. You couldn't trust anyone. Hell, even the people you took in could be gestapo agents who are willing to buy time for their family.
People were guarded in what they said, lest gestapo show up at midnight and make them dissapear in the dead of night.