In before the cop sympathizers say:
The cop was having a bad day. Cut him some slack.
If you hate the police so much, then don't call them when you're in trouble.
When I get pulled over, I am nice and respectful to the cops, and nothing bad happens to me.
It's clear that this driver was being irate and difficult. If he would have just followed what the cop said, the cop would not have gotten pissed off at him.
The cop was just following procedure.
Cops have a very tough and stressful job, so he made one mistake, big deal.
The people filming the video only captured the last part of the incident. Clearly, the driver must have done something bad that wasn't caught on camera.
The cop felt threatened for his life, therefore he was allowed to scream and yell at him. I mean, look at the driver, clearly threatening the cop.