Nukes are designed to be used, thats why you have them

  Whether the first shot is tactical or apocalyptic. The idea is to use them in a military confrontation. In a battle between two men, someone will eventually draw their sword. A conventional option was never really an option. The J20, J11, J10 none of them can even reach the united states. They would all crash into the Pacific on its way there. Its just an aircraft, it will never make it. The only thing that can reach the united states are ballistic missiles, fired over the arctic. Even if it started out as a conventional fight, you have to be wary of the idea that your opponent will eventually try to draw something lethal.