A young Jewish man walks along the street and gazes at some eugenics posters in a local shop describing the smaller head circumference and inferior brain size of Jews.
He walks into Catholic Church, where some black market trading is going on. When Schindler walks in, the Jewish traders scatter. Schindler's just looking for a business connection, but the Jewish traders are either too frightened or too principled to deal with the man with the Nazi pin on his lapel.
The young Jewish man leans in and accepts the task of trading with the enemy.