Should a person have forgiveness?

Imagine that everyday you try your hardest to help countless patients to be rid of their disability or sickness, you spent countless hours trying new ways to cure the cancer, but nothing is advanced in the end. Who could stand to watch them suffer and wallow in the hand of death? Although one day one of them comes up and offer the idea to kill himself with your help so its as quick and painless as possible for both himself and his family. Would this be such a crime to end another human being suffering when they infact want to? It may be horrible to think of at first and punishment would have to happen in the law. Though we have to forgive the doctor and step in his shoes before we make judgements over another persons fate, when they tried to help another. So why would you call this man out of the crowd, call him a cereal killer, and spit on him, when you most likely would have done the same exact action.