If you have no capacity for violence then you are a healthy and productive citizen: a sheep. If you have a capacity for violence and no empathy for your fellow citizens, then you have defined an aggressive sociopath: a wolf. But what if you have a capacity for violence, and a deep love for your fellow citizens? Then you are a sheepdog. You will walk into the heart of darkness, into the universal human phobia, and walk out unscathed. You have chosen the Way of the Warrior.
The sheep generally do not like the sheepdog. He looks a lot like the wolf. He has fangs and the capacity for violence. The difference, though, is that the sheepdog must not, cannot and will not ever harm the sheep. Still, the sheepdog disturbs the sheep. He is a constant reminder that there are wolves in the land. They would prefer he didn't go around armed at all. The sheep would much rather have the sheepdog cash in his fangs, spray paint himself white and go "Baaa". Until the wolf shows up. Then the entire flock tries desperately to hide behind the sheepdog.
Do you think people like John Wayne Gacy or Ted Bundy don't live near you? They do. There are at least thirty serial killers at large in the United States at any given time and probably many more than that. There are four million sociopaths who will kill you for driving too slow - or two fast - or for no reason at all. If they will shoot at armed police officers, sheep stand no chance.