Do I like it? No.
A wise cop told me that you don't know why the cop pulled you over. Your description could match anything. Maybe a white guy with short, blonde hair in a brown Infiniti just shot five people in Lake Worth. Maybe the cop just had some idiot pull a knife on him and he's on hair trigger.
Maybe the guy's wife just left him and he's having a bad day at work, only when I have a bad day, I take it out on the boxes in the warehouse I run. The cop has to deal with people who usually aren't happy to see him.
I'm not justifying the shooting based on this, but when people get hired as cops, they don't become perfect. Their first priority is to survive the shift. Sometimes they screw up and an innocent person gets hurt. Sometimes they screw up and they don't survive the shift.
I don't disagree with you. I once did some work for a deputy who said with a very haunted look in his eyes that if I saw what he saw I'd run for the hills.
But I've seen too much abuse of power to not expose it.