I've been watching this for a while and just decided to stay out of the debate. I really didn't have anything new to add. I'm glad you've taken a step back and reassessed your position but you really seem to look at things as black and white. No shades of gray for you. I've never been put in a position to need to choose whether to get involved but I would like to think that if I saw a 90 year old woman get dragged out of a car and beaten, that I'd take some action. Whether I was armed or not. That's substantially different in my mind from holding somebody at gunpoint for littering ( I know you never said that) or approaching somebody in Walmart that's open carrying. Having and carrying a weapon is a personal choice that gives me a tool to better protect myself and my family. Having that tool does not in my opinion make me any more or less responsible for others than I would normally be. In my mind it does however make it more important to exercise judgment and restraint. Unlike a punch, a bullet can't be taken back. So long story short I think I would prefer to analyze the situation presented, use my judgment, take the appropriate course of action.
You can get much farther with a kind word and a gun than you can with a kind word alone.