Please show me the constitutional requirement that military forces of the United States must inquire into the citizenship status of an active enemy of the Unites States before engaging him with deadly force.
Does it make sense to you that any active enemy who holds US citizenship and manages to make it to an area of the world where they cannot be reached using traditional law enforcement means should be untouchable?
In your opinion, if you as a citizen happen to be near a suspected terrorist, it's completely OK for you to be killed? What does it take to designate a foreign national as a terrorist? Could anyone be designated a terrorist? Couldn't then anyone be considered "collateral damage"?