Economic conditions after World War I lead to

restrictions on trade and immigration. Soon, this set up the stage for the Great Depression. I will go further if you tell me to.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.