If you follow or accept the line of reasoning for the Harbinger, every single OT prophecy remains in effect or can be activated by repeating specific actions. I don’t think it works that way. I have never heard it put forth by anyone. There is a new Covenant that controls.
NOW you're beginning to understand! :) America is repeating the same mistakes that the nation of Israel made. Therefore we can expect to suffer the same consequences. Not from the hand of God, but from his removal of protection from this nation because of our actions.
You should really read the book. It's a great read if you like a Tom Clancy kind of novel. Unlike a Clancy novel, the basis is all true. You'll be amazed at the similarities between the first downfall of the Nation of Israel and what's going on in America today. You can then go verify what he says in the novel is true.
There is a new Covenant that controls.
Some things changed after the arrival of Christ, mostly to do with his sacrifice for us; but the age old battle between good and evil, the fall of nations, and God having to eventually intervene continues.
While it's hard or even impossible for us to follow/comprehend at times, the end of an age is an epic with many stories.