There are some people that will kill simply because you are in the wrong place at the wrong time and others that will not kill even if their lives were in danger.
The real question I want to ask you, theoretically speaking, is there an issue or a belief that you would be willing to put your life on the line for?
Some people strongly believe that there is no need for fighting and violence for any reason (and yet they will hold a violent protest? <img src="/~stretch/ubbthreads/images/graemlins/ooo.gif" alt="" />).
Even though it is an oxymoron, do you believe in fighting for peace?