You are surprisingly hung up on a throwaway insult. One which was not directed at you. I'm curious as to why? Surely you've been on the Internet (and the Fediverse) to know it's engrained in the culture?
@Kirino@Mr_NutterButter@Hyolobrika Careless reading isn't good. But your reply was toxic. There is a difference there. One didn't read through. You lashed out. A more constructive response would be to drop that insult and quote the section he didn't read. Constructive because there's no point to talking unless it's beneficial or enlightening. Why this anger toward ignorance?
Actually look into it beyond the first sentence of Wikipedia, you actual mongoloid.
Euthanasia was given to severely mentally deficient people or people who were extremely sick or disabled. Whether you agree or not is subjective. The reasoning behind it was 'It would be kinder to them then letting them live a life in their present condition."
It's a heavily debatable topic and gray area and is one we still talk about TODAY.