Before I do that though, I want to make sure you understand that what we define as good and bad are merely conclusions to our perspection. I believe god, in every sense would have am much broader objective outlook on all existence in any form whether deemed by us good or bad.
Wellp, I deem murdering babies bad.
If anyone can argue that is "good" in a scenario in which euthanasia was not the listed reason for murdering the baby, feel free to post.
You both are looking to deep into the matter, which is humans will take care of other offspring but that is a subjective behavior and characteristic brought upon from human intelligence. My point is being a human despite ethics or moral I can neither say it's good nor bad to kill a newborn child because It would be subjective of me to do so.