The late 1800 are sometimes called ?

The era of big business

This is because a lot of big businesses and industries starting to boom and suceed in the 1800s.

The late 1800s are sometimes called the gilded age.

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.

it was displayed because they had a love for war