I'm speculating (again) that you are the only one here in the forum who doesn't believe the pitots were fouled by ice.
Well to me it aint nearly as important to know what initiated this specific event as to what actions were taken or not taken to mitigate the result.
That's the difference between finding a causal factor of blame "if not for ..." rather than accident prevention which should have been "in spite of .... "
I still await a report on this towards preventing future similar accidents