Answer:
From 1919 to 1933, Germany was governed by the Weimar Republic.
Beginning in 1929, the German economy was affected by economic problems in the United States.
In Mein Kampf, Hitler asserted the superiority of the Aryan
race.
In 1933, Adolf Hitler was appointed chancellor
of Germany.
The only way I would think is that when making a PB&J the jelly and peanut butter are on separate breads showing that division between races. But, when you put the two sides together they are supposed to taste better together than alone which might symbolize that when races come together they are better together than seperate.