Why do you have to be American to have a view about whether an incident is acceptable or not?
Tumeni has never had experience with American police except for the random video clips which start with showing a police officer with his arm up in the air about to bring a police batton beating to someone's head, or a police officer in the process of pushing someone. From this he concludes that the police are "out of control" and randomly beating people.
If Tumeni had actually had any experience with American Police he would have known that they operate by strict rules of engagement in a highly litigatious society. That police officer likely isn't beating innocent people for no reason at all, as Tumeni would like us to believe. And considering the nature of the environment these videos originate - violent protests - these people may have been doing anything from assaulting the officers, trying to grab their sidarms, or making direct threats to their lives.
So this thread really seems to be about a foreigner who did not grow up around the American police, learn about American police or American law in his school system, who did not watch American shows about the American police (ie. 'Cops'), who has no direct knowledge of the American police, and had no friends or family members who are American police (as many in America do), and who is posting here making wild, wacky, and frankly absurd assumptions from internet clips he finds online.
I don't care what events led up to the 75 year old being shoved over are, he wasn't charging at the policeman, he wasn't doing anything illegal, he was just standing there - shuffling towards them slowly maybe but clearly not a danger.
How do you know he wasn't doing anything to deserve a pushing? This article isn't too kind about the guy. See bolded:
Buffalo Officials Duped By Professional Antifa Provocateur – Arrest and Charge Two Police Officers – Righteous Police Team Stand Together and Walk Out…Martin Gugino is a 75-year-old professional agitator and Antifa provocateur who brags on his blog about the number of times he can get arrested and escape prosecution. Gugino’s Twitter Account is also filled with anti-cop sentiment [SEE HERE]. Last Thursday Gugino traveled from his home in Amherst, New York, to Buffalo to agitate a protest crowd.
During his effort Gugino was attempting to capture the radio communications signature of Buffalo police officers. CTH noted what he was attempting on Thursday night as soon as the now viral video was being used by media to sell a police brutality narrative. [Thread Here] Today, a more clear video has emerged that shows exactly what he was attempting.
So he has a blog and twitter full of anti-cop stuff, and brags about how he can get arrested and escape prosecution, and is seen in the video passing his phone over the police officer's equipment.
But yeah, lets just assume that he is an innocent old man who just happened to be at a violent protest for innocent and circumstantial reasons.

Here is slow motion of him passing his phone over the belts and chest of an officer before he got pushed: