Why, and where did they come from? I'm not here for this scarifying nonsense, which is little better than pro-cop propaganda. The police are a heavy militarized force and the police's use of less lethal weapons in the current conflict is being done to escalate and injure; for example, rubber bullets are meant to be fired from 40-70 feet away and bounced off the ground to deter approach while minimizing injury, but cops have been firing directly at people and causing serious injuries, including the loss of eyes. Yesterday evening cops in armored vehicles in Walnut Creek CA were telling unarmed protesters with their hands ups to 'get out of the way or you will be dead'. There are Tiananmen square moments happening all over this country right now so you can take your imaginary wild subgroup and stuff it back into the collection of worn out authoritarian tropes that it came from.
If cops find themselves in your fantasy situation it's because they have earned such ire. I advise them to put their hands up and allow themselves to be disarmed and taken prisoner.