So you agree the police acted appropriately then? He rolled up his window with really dark tint where anything could be happening behind that window.
That is a clear safety concern, the windows were tinted very dark, cannot see what he's doing back there. If you don't understand that piece then I'm not sure what to tell you.
For putting them potentially in harms way. When the threat was no longer present, I agree, they may have went a little too far but we're Monday morning QBing. They likely were worried something was going on behind the dark tinted windows which is why the adrenaline started up and they got a little out of hand, but not to the point the police are at fault completely and should be let go. The biggest issue here is the rolling up and not listening to cops and putting their lives in danger not knowing what is going on. Simple as that, comply and you'll be fine.