How can you send a country back to the Stone Age when it's never left?
Funny, I was thinking the same thing.
I would observe that no matter how socially and economically backward a group might be, there were no nuclear weapons in the Stone Age. There are in Pakistan, and they may have supplied the technology to others, such as Iran, North Korea, Libya, etc.
So, maybe he said I'll send your country back to the stone age without lifting a finger. :-}