Indeed, even U.S. government officials are beginning to say that. And unfortunately, it's true. The only way to at least delay the inevitable is with vigorous and ruthless preemption.
Although it's not getting a lot of ink right now (aside from tangential but important discussions about civil liberties), the U.S. government is, in fact, posturing itself to take the drastic sorts of measures needed when confronted by nuclear belligerents. At least, that's what I make of it.
Imal