You seem to have expert knowledge. It could be that the bomb’s effect or placement was just enough to destabilize the plane and natural forces broke it up. Either way, there was a bomb, and it must have killed the pilots right off — I hope it did all of the poor passengers etc too.
I am not an expert.
But I flew in business aviation for 40 years and was exposed to quite a few pilots that flew the big iron.
And I read a lot of accident reports over the years.