Maybe they need to actually see a gun or other weapon? Or at least have a suspect try and close the distance to them quickly?
Otherwise your "think they might have a gun" is an open invitation for cops to shoot anyone they want at anytime, and just use that as their excuse.
Oh wait. That is what cops are doing all the time now anyway. Hold an iphone in your hand? Get gunned down since "I thought it might have been a weapon". Move your hand anywhere near your pants (god forbid that is a natural place for your hands to be), get shot for "maybe reaching for a gun". Ask a black man for his ID, then shoot him for making a "furtive movement". Want me to keep going with these incidents?
So yes, the cops (and you I guess) feel it is totally OK that hundreds of unarmed innocent people are getting gunned down when when they have done nothing wrong. Go figure, right?
And bigotry is defend as not liking people of a certain group, or treating them differently because they are from a certain group. So yes, if you support different rules for cops, and allow them to get away with crimes that non-cops would be punished for, that is bigotry. Just like when Ackmed admitted he was a bigot for saying he outright values all cop lives over non-cop lives. That is bigotry.
I'll try to respond to most points in here... If I miss one, it's not intentional...
The problem with waiting until you see a gun is that action vs. reaction says you will lose every time. It takes about 2-3 seconds to process what you see and then react to it. If the officer waits until the hand comes out from behind the person's back, sees what they have in their hand, and then reacts to it, there's a good chance they will already be dead. I agree, it's a hard line to determine. In this case here, I'll have to watch the video again, but doesn't he start advancing towards the officers? I could be mixing up videos though.
With the idea of "he might have a gun", that's not an end all excuse for cops. They need to be able to articulate why that is. If you have something in your hand and the cops tell you to drop it, you should drop it. If they tell you to put your hands up and you put them towards your waist, you are indicating that you are not going to follow their directions. If they have information or there are indicators you are armed, that is going to be an issue.
With the ask for his ID and shoot him anyways, I assume you are referring to the shooting in SC where he went go back into his car and the officer shot him. That was a bad shoot and the officer was charged and found guilty for that.
And no, I don't want innocent people to be shot and killed and I'm sure that cops don't want that either. I get the impression that you feel that cops go out with the hope that they get the opportunity to shoot someone that day. I would gather that cops hope the last thing they ever have to do is shoot and possibly kill someone.