First off, we should define the word violence. One dictionary definition says, Violence...the unlawful exercise of physical force."
Here we differentiate between active violence to show our power over another human being, defence of oneself or loved ones, and active participation in military service.
The bible is clear that we are to avoid violence, and I believe, in every reference one might give, it is the dictionary definition that is in mind..."thou shalt not kill...." and "turn the other cheek..."
The fact is, God used violence in certain judgements. The gospel itself requires radicalism..."except a man be born again, he shall not see the kingdom..." Now, nothing can be more radical than that!
This question is one that every Christian faces when he joins the military, and especially when one goes off to war. I was a chaplain, but I was first an army officer. As such, I was issued a weapon. If I was not commissioned to kill, Why was I issued a weapon? I was not a fighting serviceman, so obviously, my weapon was for self-defence. Would I use it? Could I use it? In the beginning, I was an idealist and thought that I would never squeeze the trigger. It didn't take long to change my opinion on that. Yes, to both questions, and I would use it with clear conscience. It is a violent action, but nowhere in scripture does it condemn military service, and in fact, there are a multitude of scriptures defending military action.
We have a duty to defend what is right, and we have a duty to serve our country. As Charles Peguy wrote, "People who inist on keeping their hands clean are likely to find themselves without hands."
Having said this, I would never defend personal violence in the form of backgarden confrontation or street mayhem, family confrontations or child correction. I will choose the radicalism of love every time.
Cheers,
Jim