still, that's some bullshit. you don't have to like someone for a fight to be reasonably fair, even if the guy deserves it.
that door guy has a lot to answer for in my opinion. you have a psycho wielding a stick outside your bar. you're on 6th. the only reason you throw that guy out there is so he can fight an unfair fight. cops should be there any second, just wait out the stick guy.
then, when the unarmed guy starts getting the upper hand with the stick, the door guy fucking grabs it. what the hell dude.
once, i almost got arrested in leidseplein during a near riot during a street fight. short version: dude is ejected from club, resists, loses the fight, and is on his hands and knees in the street. out of the club, defeated, got what he deserved, i reckon. then one of the bouncers takes a running start and just free kicks the guy's head. near everyone went around went from slightly interested bystander to a very vocal enemy of the club right then in that moment. as the police were arresting the guy on the stretcher, i was trying to tell them it wasn't a fair fight and the guy had given up when the guy took a free run kick at him.
that's when the dutch police said to me "you don't tell me what happened. i tell you what happened." me and my boss tried again and the ams cop basically implied i could join the unconscious guy if i wanted to keep talking about it.
police be police no matter where you are. never talk to them ever.