I've always noticed how when tragedies happen people have a tendency to want to blame a person, with the implication that a bad decision that lead to the tragedy makes someone a bad person. That's an attitude that has always bugged me, certainly nobody who knew the outcome of what they were doing was going to be a plane crash would have chosen to proceed. Whatever happened here I think there can be little doubt that this pilot taxied out and pushed his throttles forward with an expectation of making it safely to his destination. We know that didn't work out and we have a good theory of why that might have been but as others have pointed out the NTSB hasn't been out yet- it could still turn out to be mechanical failure or something.
Questioning a decision is something we ought to be doing. Questioning why that decision was made was another thing we ought to be doing. Looking at the pilot's experience, condition, ratings, etc are also completely valid things that we should be doing. This is the useful stuff, this is how we learn what causes problems. This is how we get good statistics and improve safety. We need to do it.
What is not useful is attacking the pilot's character. Attacking the choice is fair game but not the person. I think that, if anything, undermines safety because it puts us into a mindset of "well I'm no dummy, I wouldn't do this". Maybe you wouldn't, maybe I wouldn't. However, I bet every one of us has or will do something that, in hindsight, was probably a really bad idea. It is in our best interest to look at pilots in these sorts of incidents not as irresponsible yahoos but as one of us who made a poor choice and ran out of luck.
tl;dr I am interested in these things to learn something not condemn anyone.