Harriet tubman underground railroad

Harriet Tubman was an American bondwoman who escaped from slavery in the South to become a leading abolitionist before the American Civil War (1861–65). She led hundreds of enslaved people to freedom in the North along the route of the Underground Railroad.

Explanation:

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.