Ive read it, I just think you could make the same claim about FDR, Wilson, Teddy, Lincoln or others, who all would have ended it before JFK. So why is JFK the guy that ended America and not the guys before him.
All of the other things could have been fixed politically and survived . The JFK (and his Kennedy legacy) is that we can never recover, we have been and remain in the process of being replaced.
America is now a multi-cultural, multi-racial, multi-religious, globalized economic center only, we are merely fighting a delaying action and to retain some basic rights now as the USA disappears from memory.