I honestly believe there is almost always a peaceful alternative if we don't get caught up in the moment.
I wouldnt go as far as saying "almost always" but in a lot of situations you are right. I will highlight the situations where that idea comes crashing down:
1. Juveniles. Juveniles, especially when their are groups of them, can be very combative. Much more so than adults. Unfortunately, juveniles are also the most unpredictable. Alcohol is like throwing gasoline on a fire with juveniles.
2. Groups of people. I have been in situations when I am talking calmly with one or two people. Everyone is calm and understanding. Then more people come out to see whats going on and the person your arresting does a 180 and starts screaming. The cellphones come out. There is absolutely no way to calm down a mob of people.
3. Domestics. The most dangerous scenario for a cop to walk into. When a cop walks into a call for domestic violence or when a cop arrests the targets significant other, get ready for some problems. Tempers and emotion are at a peak plus theres usually alcohol or drugs involved.
3. A person under the influence. Always an uncomfortable situation, especially when the are really drunk or high on PCP (the strength people have when high on PCP is not from this world). Theyre unpredictable when they are under the influence and are much more prone to violence.
Look. That video was bad and the cop shouldve handled that better. But, what people who arent on the job realize is that were usually not dealing with rational people. Theres a saying the cops deal with either bad people or good people on their worst day. Most of the time the situation can be defused with simple talking. But when your in a dark alley either alone or with 1 other person and you have no idea what youre getting into; you are going to be commanding and acting decisively especially when your in a area that is known for drugs and violence. My behavior is reactive to the enviorment I am in and how the subject moves/acts.