This group was opposed to immigration after the Reconstruction Era.

The Ku Klux Klan.

Explanation:

The Ku Klux Klan was an organization created in 1865 in the South of the U.S. They were against equal rights for all Americans, immigrants, certain religions, and political parties. The Ku Klux Klan believed in white supremacy and a hierarchical organization of the society based on race, which was what the Republicans were trying to change. To achieve their goals, they used violence and terrorism.

After World War I, there was a revival of this organization. They strongly opposed immigrants since they claimed that they took jobs that Americans could do in a context where industrialization was changing the order of the world.

can you show the map , i'll be able to update my answer

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.