Ah, yes, I read the Selfish Gene a long, long time ago, and then the God Delusion.
Applied here though, my first instinct when I read something like what you just wrote is to look for an external answer. I.e., a "nurture" explanation, as opposed to what I think you characterize as a "nature" explanation.
But to be honest, if I reflect on my own anecdotal case, I really was like that all the way as far as I can remember as a little kid. So perhaps you're right and there's a "wiring" aspect to it that would make Dawkin's ESS applicable here too.