What ur talking about is only one type of euthanasia, which is passive euthanasia.

There's also non-aggresive which is removing life-support, and there's aggresive which is prescribing deadly drugs to actively kill the patients. So some doctors actively kill their patients. Aren't doctors healers and not killers?

By the way, I don't have a firm view on this, I'm just looking at both sides of the coin.