Collective Responsibility -v- Individual Responsibility.

[Radar]

I say the person who is motivated to help himself and the person who is motivated to help others for the good feeling it gives him inside are the same person.

The guy in the house has an icky feeling because his neighbors are going to be slaughtered. He helps himself get rid of this feeling by inviting his neighbors into his neighborhood fortress. Presto! The icky feeling is gone, and his neighbors thank him profusely making him feel like a hero. He's avoided something he doesn't like, and gained something he does like.