Nobody has the right to take life. If it is their own life or that of another persons life under no circumstances. Terminal illness do not give anybody the mandate to take life until nature takes it's course.Miracles do happen everyday and a ternlnally ill person can recover .
And why not? even if miracles happen, it is for the individual to decide if he believes in miracles or not. But everyone should decide about his life for himself, ill or not! Even if you want to prevent those people from going to hell, we should interfere less with things which are non of our concern.