Pearl Harbor was attacked on December 7th, 1941. It set off a chain of events for the U.S. involvement in WWII. Also, it heightened the racial tensions with Japanese Americans in the U.S.
African Americans
Following the Attack on Pearl Harbor, all Japanese Americans along with German Americans and Italian Americans were marked as "enemy aliens" because they were seen as "potential collaborators". They were forced to carry identification cards, turn over weapons, cameras, or anything that could send information to the enemy.
Jewish Americans
No More German Products!
SEND THEM FOOD!
Throughout WW2 women were beginning to get many, many new opportunities in the line of work. At first, that simply meant working more jobs outside the house but later they started doing jobs normally held by men such as being a soldier, a mechanic, a physicist. However, with the men gone for war, many women were forced to take care of their children on their own as a "second job" doing housecleaning and cooking, everything that comes with being a mother.
Mexican Americans
After facing much discrimination throughout many jobs, African Americans decided to take a stand and fix things. After threatening a full-on protest on the white house, Roosevelt signed executive order 8802 whivh outlawed discrimination by defense contractors. This order helped almost a million African Americans find work in the defense industry.
Throughout World War 2 Jewish Americans were under more emotional stress than anything else. The mere knowledge of the fact that their fellow Jews were being slaughtered was enough to drive them up the wall. In turn, many American Jews chose to boycott German products and hold big rallies in order to urge the government to both send food to the starving jews in the concentration camps and also leave some leniency in terms of the immigration laws so more jews could enter the U.S.
Make the immigration laws more lenient!
World War 2 brought upon many things for Mexican Americans, especially in the form of work. Many Mexican Americans chose to fight for the U.S. and proved to be an especially powerful force as they were awarded with many honors throughout the war. Many others decided they didn't want to fight for a country that didn't consider them citizens of so they made due at home. This proved well as the shortage of men caused a great opening of jobs in both industrial jobs and construction.