the notion of "resisting arrest" allow police to do pretty much whatever they want from the moment you said "no" to one of their asks.
Hell even getting out from your vehicle when a cop tells you to stay in it is "resisting arrest".
this is the main problem. if you give people a way to be legally violent you are responsible for the deaths. its is beyond politics, democrats or republicans allowed these laws and procedures, the neck restraints and other dangerous things for decades.