Explain what the "red scare" was, (1950) and how did it start?

The red scare was a widespread potential fear of communism or anarchism by a society or just a state. The Scare had its origins in the hyper-nationalism of World War I as well as the Russian Revolution. ... Bolshevism and the threat of a Communist-inspired revolution in the U.S. became the overriding explanation for challenges to the social order, even such largely unrelated events as incidents of interracial violence.

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explanation:

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during the hitler era and it caused them to declare war on germany