I'd say it takes one to know one. :)
If I dare go off on a tangent, I also enjoy writing, photography, music, and flying! On a more serious note, though, I'd also say I've had some mighty good friends who have helped me along the way.
No, I would never harm another human being unless it were absolutely necessary, and I sincerely hope it would never be necessary. Something some people don't understand, however, is that sadly, reluctantly, it is sometimes necessary to harm another human being. I don't like it, but it's a sad fact of life, something the vast majority of us who have served in the military, or on a police force, understand. However, I think most people who have not served in this way understand this, as well, as it's a fundamental tenet of our human existence. I feel Saving Private Ryan dealt with these issues quite well, and as gruesom a movie as it was, I would recommend it to any adult. My son visted with me recently, yet he's only ten, so he's far too young for it's content. Much, much later!
I think the driving question is whether any of us would be willing to harm another human being, if doing so were the "right" thing to do? I spent 20 years in the U.S. military, so I know what my answer is, yet I thank God I've never killed anyone.
I very sincerely hope I never have to. I will not, however, forfeit either my own life or the lives of friends and family. That is why I carry a firearm. My life, my son's life, and the lives of my parents, aunts, and uncles, are worth protecting. Some may fault me for caring enough to protect their lives. That's ok. I swore and fought to protect their Constitutional rights to believe that, the same as I swore and fought to protect the rights in which I believe.