The Red Scare, the growth of the Ku Klux Klan,
and the murder convictions of Sacco and Vanzetti
were influenced by
(1) the rise of organized crime
(2) the passage of immigration quota acts
(3) a distrust of foreigners
(4) an effort to stop fascism
The Red Scare, the growth of the Ku Klux Klan and the murder convictions of Sacco and Vanzetti were influenced by "(3) a distrust of foreigners". This was a paranoid time in the US.