It seems like the world would be better off if the Tipitaka didn't include the deaths of Vakali and Channa. It's not good that they be mentioned in a setting like this.
I don't anticipate this being a constructive discussion, because people will tend to pick the interpretations that favor their own biases.
The suttas make it clear that killing is wrong, but also to practice discernment and compassion. People who are sincere in their beliefs can come to differing points-of-view by emphasizing these two different aspects of the teaching. And they can both come to mistaken beliefs too. Suicide is obviously wrong in every conceivable case that could be brought up today. But with euthanasia (as with abortion), I don't think it's so simple. In my opinion, it is as foolish to categorically condemn euthanasia as to defend it. I respect and honor a person who would not kill another or ask to be killed, regardless of circumstances. But I don't think we can always simply disregard the evaluation the circumstances and not ask, "Are we really being wisely compassionate or are we just blindly following a certain rule?" We should acknowledge the possibility of finding specific cases where it is unwise and cruel to follow the letter of the law, of the precepts.
The wholesomeness of our own view is also demonstrated by our emotional reaction when we come into contact with an opposing view. If, when you come into contact with an opposing view, and you feel hatred, you should examine that and you may see that your own view is tied up with hatred.
The best things in life aren't things.