I do challenge you to show me the law stating that the military cannot engage unidentified and non-responsive potentially hostile vessels breaching controlled airspace, let alone with full authority from the CIC. That's just about the dumbest talking point ever.
Though even if such law exists, which it doesn't, then like any law in modern times, or even increasingly the Constitution, if the political establishment deemed it inconvenient then they would simply ignore it, and make up some lies.
And on that note, they are now acknowledging that they are indeed drones. The 'its just airplanes' lie lasted about 5 minutes. These people seriously hold the public in contempt.
My original point was and is that there are many laws restricting what the military is able to do domestically.