Just watched the video. I can see the arguments on both sides here.
It's clear he is attempting to squeeze his car in a narrow gap bwetween two police cars, in an effort to escape.
Pro-shooting: Even though not aiming the car at officers, there are officers behind the cars so there is a risk that in doing what he is doing he will push the cars into those officers.
Anti-shooting: There is an opportuinity to approach the driver's side of the vehicle in relative safety. I've seen a few BWF videos in my time where the driver is ramming a police car with his/her vehicle and an officer smashes the driver's window with a baton and pulls them out. Usually they are unarmed officers.
I think you have a perfect storm here of a car that had been used in a suspected firearms offence the evening before, and the stop being carried out by firearms officers, followed by the stupidity of trying to ram your way out of a roadblock. I read that the officer, Blake, didn't know about Kaba's past at the time, which I find somewhat difficult to beleive given they receive a pre-op briefing.