If this is a CFIT, what it looks like so far, then someone has to be to blame, unfortunately. That's one for the survivors, the press, and perhaps some lawyers to chase, though.
We just need to wait for the NTSB to try to figure out what happened, and tell us that, leaving blame aside. With no data recorded prior to the accident that will be difficult to do, unless they can find some obvious technical defect that could have caused the accident.