Final answer:
Joseph McCarthy is not the main reason for McCarthyism because he didn't initiate it, but his actions during the Red Scare intensified the anti-Communist hysteria, leading to his eventual downfall after his improper conduct during the Army hearings in 1954.
Step-by-step explanation:
The question asks why Joseph McCarthy is not considered the main reason for McCarthyism. After thorough historical analysis, it becomes evident that McCarthy did not initiate McCarthyism; rather, he escalated it. The term McCarthyism is used to describe the period of intense anti-Communist suspicion in the United States, which Senator McCarthy capitalized on for political gain.
McCarthy's accusation techniques, including making unsubstantiated and exaggerated allegations, exemplified the Red Scare hysteria of the time. He gained fame for his ability to stoke the fires of anti-Communism but ultimately faced decline and censure for his improper conduct and bullying tactics during the televised Army hearings in 1954, which effectively marked the end of his influence.