Let me give this wonderful brown townogy with former East-Germany.
They were not really bad and evil, just not democratic.
When 1 person tried to cross the border and they shot that person, the entire world was alarmed and East-germany was suddenly the death pit of doom that should be nuked and killed and burned to death.
because of 1 person doing something unacceptable.
The entire group has to have a bad image.
By everyone outside of the group.