Question

What caused Americans to fear communism and communist spies ?

Answer 1

because they though they were everywhere from their government to their houses

Answer 2

Historically, many Americans have feared communism. This fear skyrocketed during World War I. As this war was ending, a fear-driven movement known as the first Red Scare began to spread across the United States. In 1917, Russia had undergone the Bolshevik Revolution.