I'd suggest that conjecture waits until there is some kind of evidence to be considered.
In a perfect world, aviator's would know this intuitively and leave speculation of cause to the ignorant and the media. Respectful discussion would revolve around the possibility of learning and improving from the accidents and mishaps of others for the sole purpose of improving flight safety - alas we do not live in such a world.
This tragic accident, as with so many before, shows people simply cannot resist clutching at straws and posting their idle conjectures - sometimes with unfortunate consequences.
In this instance it would seem you are all quite likely to be miles off - and no I won't be elaborating or posting further.
RIP and thoughts with the family.