You seem to be arguing against a position that, as far as I know, no one on LW actually believes or defends. You are doing this by generalizing about religiosity from examples of marginal and/or long since vanished religions, and all the while you are ignoring entirelyuseless's probably correct observation that most infanticide historically has been due to reasons (warfare and practical considerations) that have nothing to do with religiosity.

I am not sure where you are going with all of this.