Answer:
We are the barriers to our nation. We are accusing our own government. Worried about people in the U.S. as a threat to democracy.
Explanation: What McCarthy meant in this speech is that Americans had become accustomed to thinking of Communism as simply a global force that had to be checked through military strength and diplomatic efforts. But the reality, he suggested in this speech, was that Americans faced a more insidious threat from Communism—one from within. He claimed that Communist agents had infiltrated American society and even the American government.
The purpose of this speech is how to tackle the problem by looking inward and not outside because according to him the enemies are from within.
