Biblically speaking it is absolutely immoral. How would you turn this concept to be morally right in fact this is rejected in most of the countries of the world?
I don't know much in your country if your doctors practiced mercy killing.
What are you trying to figure out?
No need to write a very long question. It's too complicated.
You can just summarize your novel into two or three sentences to form a very good question.
Just ignore them. They don't know what they are doing. If you think you're doing the right thing just continue doing it. Sooner or late they notice your goodness.