There are in fact quite a lot of those moment. Videos of officers taking a knee with the protesters, holding up signs against police brutality or actively participating in marches.
I would guess that all countries have some police officers who joined the police to live out their action hero dreams and end up being way too aggressive in situations, but even the US have plenty of officers who care more about the society than trying to be tough guys. But sadly the ones getting the attention are the ones doing the wrong things (on both sides)