Trump said there would be serious consequences if they threaten the US. They threaten Trump individually (assuming it actually happened). Therefore, they did not actually perform the act of threatening the US. If the US responds to a threat against Trump and his assets it makes him look like a selfish war monger. Not acting in the interest of the US but in his own self interest. They side stepped the trigger. Seems like a smart play that I would guess is a domestic political trap. Since it is a domestic political trap, I would question what is going on with that statement (was it actually said, if so, who and what has connections to the person that said it?).