Eugenics gets a bad rap and deservedly so because it usually leads to massive discrimination and ethnic cleansing.
We're human beings and not xayawaan, we don't put our weak children out in the woods and we don't abandon our old because we have a moral imperative not to. I'm not one of those who claim atheist lack morals due to their irreligiousness but thanks for giving them a great example to point towards.
I'm just being logical, whats the point of keeping a semi sentient individual around?
Let me put it this way; would you abort a Zika baby or not?