Look dude, I think the cop reacted too quickly but we all should have self preservation on our minds. He yelled at the guy 3 times to stop reaching. I personally would have stopped reaching after the first command. My hands would have gone up and I would have said, "Sorry, sorry, sorry..... my bad. What would you like me to do?"
Nobody puts themselves in the shoes of the cops. It isn't an easy job and people are trying to kill them. Mix in the defiant attitudes groups like BLM are instilling in people and it is a recipe for over reactions.
I mean, one of the greatest guys I ever had the pleasure to know was killed in Sacramento on a routine traffic stop. Shot by a black guy while he walked up to the driver's side window.
Lets not pretend that officers have no reason to be on edge.