What caused the red scare in america?

A "Red Scare" is the promotion of a widespread fear of a potential rise of communism or anarchism by a society or state. The First Red Scare, which occurred immediately after World War I, revolved around a perceived threat from the American labor movement, anarchist revolution and political radicalism.

Explanation:

The first Red Scare in the U.S. happened just after the 1917 Bolshevik Revolution and during WW1, when people were very patriotic and social agitation of left-wingers further aggravated the political, national and social tensions. After World War II, the second Red Scare happened due to a fear of communist espionage.

Explanation:

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