What is American identity

What is the best way to combine these sentences?

"as one of our outstanding historical figures once said, ‘when a great democracy is destroyed, it will not be because of enemies from without but rather because of enemies from within.’" (paragraph 7) how does this quote reveal mccarthy’s point of view and advance the purpose of his speech?

Who is ¨ the guilty party¨ at the end of the text, and how do his actions contribute to the storys theme?