[Tzfat]

From the pictures I've seen, the large debris field (mostly small pieces extending over several ridges and valleys, some major pieces widely separated in the valleys) would indicate a complete breakup of the aircraft before it hit the ground - but not at high altitude as the wreckage is too concentrated. That is puzzling, but the pictures we have seen may not be of the complete scene. From the available ones, there does not seem to be a definitive point of impact.

I share your perspective. The debris field does not make sense for an impact with the ground. Unless it was vertical. That would seem to indicate an intentional impact, in light of a long descent. Either the pilots were dead or unconscious, or this was intentional.

A low altitude disintegration is the first thing that comes to mind. Bomb, or airframe. Multiple explosions could do it to. One at high altitude, another altimeter triggered device lower.

[McGruff]

Ready for this?

Did Germanwings plane’s windscreen CRACK? Pilots of flight 4U 9525 may have been incapacitated after oxygen level plunged

Reports on professional pilot forum suggest black box voice recorder reveals ‘structural failure’ caused disaster

http://www.dailymail.co.uk/news/article-3010610/French-alps-crash-French-alps-Germanwings-plane-crash-Lufthansa-GWI9525-4U9525-Airbus-A320-Barcelonnette-Alpes-Hautes-Digne-Les-Bains.html