If I blocked someone from getting in their driveway and shouted insults at them, I think getting punched would be reasonable. I am not a professional conflict resolver.
Police, on the other hand, are our paid civil servants. It is their job to remove passion and emotion from the interaction and to deescalate potentially dangerous situations. They have a duty to respond sub-proportionately in a way that resolves conflict unless their life is in danger.
Time and time again we see police responding by escalating tension, passion, and violence. This is a spectacular failure of their duty and huge breach of public trust.