Final answer:
McCarthy is not the main reason for McCarthyism because he played a minor role in the development of anti-communist organizations.
Step-by-step explanation:
McCarthy is not the main reason for McCarthyism because he played a minor role in the development of anti-communist organizations. While McCarthy was able to use existing anti-communist organizations to his advantage, he did not initiate the start of these organizations. Additionally, McCarthy was involved in anti-communist activities, but his accusations were unsupported and he never produced evidence to support his claims. Therefore, while McCarthy was a prominent figure during the McCarthyism era, he was not the primary reason for its existence.