If a soldier dove on a grenade to save an enemy soldier who'd killed his mother, I'd be impressed in terms of it's apparent altruism...though I could imagine there'd be a Darwinian explanation (even if it doesn't occur to me in the moment.)

What about an environmental or a neurological or a psychological explanation? What's so special about genes as a causative factor?

I think Dawkins admits 'selfish' was the wrong term to use.

The main reason for this is because people constantly misunderstand it.

But it's helpful to think of a replicator-centric mechanism for evolution, versus anything on the organism level.

It certainly is the right way to think about evolution, and I also think the figure of speech is nice to have if not misunderstood.