Given the magnitude of the numbers you present, I can understand why you missed the author's perspective of "choosing" those 8,000 babies to die. Could you pick them? As a "pro-lifer" would you?
I'm not entirely convinced myself - if I were posed with the same situation, I'd say "kill me instead of one of my kids".
It sounds like your heart is in the same place as the author's (trying to save babies), calling him an "idiot" hurts more than helps the common cause.