On the Alitalia observations, I don't believe there has been an official statement released on what they saw. In fact, reading back through this thread, there seem to be conflicting narratives about the sequence as they supposedly observed it.
There is no plot that I have seen of the position and orientation of the Alitalia plane at the time the crew observed the impact, nor has there been any calculation of the distance between the Alitalia plane and the first pole knocked down, nor a correlation of that distance with the visibility at the time.