Truebeliever
6.5 Creedmoor
Is it reasonable to believe that he is going to shoot you for no justification from an objective standard from your point of view. The answer is no. That’s the answer for your question .So, you are saying that if a cop knocks on your door with his gun drawn, can you just assume he is an imminent threat and blow him away right through the door then ?
Now if the officer was not identified as a police officer and did what you described , despite being a police officer , you could be justified.