If the new police, whatever you want to call them, have the power to enforce laws then they will be subject to all the same pressures as current police. Power corrupts!
The fact remains though is that there’s a very large number of people in the US who want the police to commit the violence they have. They’re voting for the politicians who pass these laws.
You can find many of the same problems with police in other countries which don’t have the same ancestry.