I am a cop in one of the most criticized and maligned police departments in the country. In addition, I investigate police involved shootings. I've reached the realization that no matter how blatantly justifiable a police officer may be in given situation, there will always be some idiots out there who think they could have done better. Never mind that they lack the courage or character to be in that sort of situation in the first place, they know and would have done better. Some of these people use these incidents for political gain, some simply because they are ignorant. In coming to the above realization, I have also come to the conclusion that the only thing that truly matters to ANYONE involved in a use of deadly force is that the justification has to start from within. If you shoot someone, you have to know that use of deadly force was justified and move on from there. Then so long as you articulate it appropriately it should be deem legally justifiable.
Then, as to the rest of "them", who cares? You will never convince them so why butt your head against that brick wall?