And the vast majority of policemen are not beating people up.
It's not at all obvious to me that the majority of policemen don't support the abuses, even if they aren't all getting their hands dirty.
I can't see how you can classify this as an abuse. Yeah, the cops should have apprehended him instead of pushing him after he started scanning their equipment, or whatever he was doing, but it's very clear from the clip the officers had no intention of harming the man. You even have some guys in green checking on him at the tail end of the video. The officer which pushes him also appears to try to help immediately after the incident - even if it's not exactly clear what he was trying to do -, before he is pushed back in formation.
Did any officer resign in solidarity with George Floyd's murderer? Or in some other incident which we can all agree is an abuse?