Is "hands up, don't shoot" a perfect example of?

No. It's more of a case of those people wanting to be led around and told what to think and believe. It's a lot easier to be told that you should believe this than it is to actually get the full story and come to your own opinion on what happened.

Somebody somewhere claims they saw this happen. But the human brain does not like gaps in events, and will try to fill in the gaps when needed. The person probably doesn't even know they are doing it because they did it subconsciously.

For example, if you see a man walking toward a banana peel on the ground, hear a loud noise that you turn to look at, then turn back and see the man on the ground, your brain is going to fill in what happened, and you will swear that he slipped on that banana peel, even though you didn't actually see it.

So you are saying that holding hands up, people will still shoot?

that their hopes, or they aren't smart enough to know what the truth is.