What factors contributed to anti-black violence, labor defeats and the red scare in the 1920s?

Antiblack violence stemmed from the African Americans determined to achieve citizenship rights because many fought in the war and had pride in themselves as a men and as American citizens. The war effort also increased the size and power of labor unions, but when workers tried to maintain these standards after the war, employers cut wages and fired union employees. In Adkins v. Children's hospital, the Court voided a minimum wage for women workers in DC.

No clue what is the answer