I believe the NTSB investigators' report that is based on the full video and interviews of  those involved and several witnesses. I am more inclined to believe the NTSB is less biased than the opinions of people who weren't even there.
My biased opinion is that the person who was in charge of the airport is at fault for letting such an event occur without proper professional supervision.That is my own biased opinion and not based on all the information the NTSB had, I am very likely wrong