Answer:
They took them to concentration camps. If they were small children or pregnant women, they were usually told that they would be taking a shower, when in reality they were taken to the gas chambers and gassed immediately. If not, they were forced to do hard labor and often do shameful things for entertainment.
The answer is: the spotlight effect.
People who experience a spotlight effect would perceive that they are receiving more attention from other people than they actually do.
This effect tend to be caused by irrational fear of social judgement. The fear caused personal insecurities that make the victim felt every gesture made by other people was made to mock him/her from behind.
Example of a spotlight effect is when an overweight person felt insecure about their body and falsely perceive other people who are having personal conversation behind him are currently mocking his body.