Why did the ku klux klan dislike unions during the early 1920s?

The Ku Klux Klan disliked unions during the early 1920s because these were often mixed-race unions.

Explanation:

The Ku Klux Klan, often called the KKK or the Klan, started as a white supremacist hate group that went after the African Americans. They particularly disliked unions in the early 20th century because there were unions called mixed-race unions in which the African American people could participate and fight for their rights was well. Also, in their definition of whiteness, they exlcuded immigrants and Catholics. They represent an extreme form of racism and white supremacy.

the answer is jerusalem