Why the cultural background of the groups that were targeted by the Ku Klux Klan in the 1920s represented a threat to large numbers of Americans?

In the 1920s, the Ku Klux Klan targeted various cultural groups, including immigrants, Catholics, and Jews, viewing their different customs, religions, and social practices as a threat to what they considered traditional American values. This fear stemmed from a rising wave of nativism and xenophobia, as many Americans were anxious about the societal changes brought on by Immigration and urbanization. The Klan capitalized on these fears, promoting a narrative that these groups undermined the nation's unity and moral fabric, thus fostering widespread support for their violent and extremist agenda. This climate of fear and intolerance ultimately threatened the social fabric and democratic ideals of American society.