Why did the cases of Alger hiss and Rosenberg heighten the anti-communists mood of Americans?

The cases of Alger Hiss and the Rosenbergs intensified the anti-communist sentiment in America by linking high-profile individuals to espionage and communist activities. Hiss, a former State Department official, was accused of being a Soviet spy, which fueled fears about communist infiltration in the government. Similarly, the execution of Julius and Ethel Rosenberg for allegedly passing atomic secrets to the Soviets exemplified the perceived threat of communism, leading to widespread paranoia and distrust in the post-World War II era. These cases contributed to the broader Red Scare, reinforcing the notion that communism posed a significant danger to American values and security.