It is worth noting so, that of all western style democracies only the US has the kind of problems with police violence. Not saying other countries don't have police violence, but not even close to the degree the US has.
So instead of looking at alternative societies in Syria, how about looking at European countries and the way they are policing? Or Canada?
I'm a bit surprised by someone who's familiar with an anarchist theory to be this naive about this stuff.
Today in Rojava (society in Syria based in part on anarchist principles) they are replacing the police with alternative institutions.
You can read more about it here: http://hawzhin.press/2020/06/01/how-to-abolish-the-police-le...