Why were many Americans fearful and suspicious of communists during the 1940’s and 1950’s?

These fears came to define–and, in some cases, corrode–the era’s political culture. For many Americans, the most enduring symbol of this “Red Scare” was Republican Senator Joseph R. McCarthy of Wisconsin.

Explanation:

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).