How was the Sacco-Vanzetti case and the red scare related?

The Sacco-Vanzetti case was during the Red Scare in the 1920s, when fears of communism and anarchism were rampant in the United States. The case of Italian immigrants Nicola Sacco and Bartolomeo Vanzetti, who were convicted of robbery and murder, became a symbol of anti-immigrant and anti-radical sentiments of the time, fueling the Red Scare hysteria.