The only problem with making a homemade nuclear weapon is the lack of equipment, uranium, hydrogen, whatever. Personally I'd be more scared of those dirty bomb thingies, they spread heavy radiation over a large area and render it uninhabitable for thousands of years. Can you imagine what would happen if they did that to washington or NYC?
But, since everything that ever occured in history has turned out for the better (we're here now, aren't we?) I'd use the philosophy that history repeats itself, therefore we'll be okay. This war will end eventually, succesful or not, the world will be peaceful again, and we will wait for another fifty years before a catastrophy on this scale occurs again. American Revolution->War of 1812->Civil War->World War 1 and 2->War on Terrorism. That's just in america. Each time we've been faced with some horrific fate of either nonexistence or torture by foreign powers, and each time the better world as a whole has pulled through succesfully. Humans are fighters, and we have been since we've been worms swimming through gentle lakes hundreds of millions of years ago.
Everything'll be fine. You just see.