Final answer:
In Bolkenhain, the Germans seem different from those in Poland. Propaganda has influenced the German people's preconceptions about Jews.
Step-by-step explanation:
When Gerda visits Bolkenhain, she notices a difference in the Germans there compared to those in Poland. In Germany, the propaganda spread by the Nazi party has had a strong influence on the German people's preconceptions about Jews.
Propaganda is a form of communication used to manipulate public opinion, often through misleading or biased information. The effect of propaganda on the German people's preconceptions about Jews was that they began to believe negative stereotypes and view Jews as a threat to Germany.