MS804 The unraveled mystery

On the night of May the 19th, 2016 at about 00:30, flight MS804 Egyptair falls mysteriously at a distance of about 300km from the North coasts of Egypt, sinking into the waters of the Mediterranean Sea with 66 people on board.
The experts cannot find a valid explanation. The only available theories are a fire on board or a terrorist attack.
The lack of viable alternatives is at least anomalous, since the evidence and clues of the responsibility of the plane crash are clear and freely accessible by anyone on the internet.
Are we sure that, among the people involved, there is someone interested in concealing it all?