A stall at 30,000+ ft would induce a nosedive. At ~65 knots there is not enough forward speed to keep the plane flying. Without the rudder and elevators there is no way out. What is left would probably fall in the same way as a 'whirligig' from Sycamore trees, it would spin in a flat plane. The pictures, to me, indicate that is what happened.
The debris field from main to tail is about 800m, yet bodies were recovered some 8km away.
Catastrophic fuselage failures have not been seen for many years, certainly not with an Airbus - think De Haviland Comet in the 1950s.
I have no idea what happened, but I do fear we are not being told anything like the truth.