How do you justify helping even war veterans without resorting to Christian (or other but similar) morality, unless you are doing it for the power buzz? Why should they be helped? What is the desired end result of this activity, and why - from your point of view - is it desirable?
We cannot claim to be 'nihilists' and then swallow one of the precepts of modern Christian morality - that it is worthy to help the helpless - wholesale.
Caring for humans isn't a Christian value. It's a human value. Since when does caring for someone mean that one is Christian? The end result of helping someone out is the idea that if you take your time to help someone, someone else may do the same for you when you're in trouble. We don't live inside our own little worlds. We share this planet, and others affect our existence just as much as we affect theirs, so it's a logical choice as far as I'm concerned to help others when you can.
So again, how in the world does that have to do with Christianity? It doesn't.