It would be terribly difficult for the prosecutor to prove that "but for" the actions of the defendant another person died. Secondly, I find it hard to believe

It would be terribly difficult for the prosecutor to prove that "but for" the actions of the defendant another person died. Secondly, I find it hard to believe that anyone who has had to act in moments as extreme as this would have such a harsh view of others who had never been in such a situation. I spent a good portion of my adult life in extreme situations and I can tell you people do not operate with their conscious minds. They do not really "make choices", things just happen. This is why training is so important for people who might encounter extreme situations. Please be more gracious to these people.