Motive for Forgery
Video profoundly influenced 9/11 researchers,
favoring theories the Pentagon was hit by a missile and/or small plane.
Thierry Meyssan's second book incorporated this idea.
Idea of small-plane/missile attack led to wholesale dismissal
of eyewitness accounts by most skeptics
who rejected the offical account of Flight 77 hitting the Pentagon
based on physical evidence.
Faction embracing eyewitness accounts
became polarized from physical evidence faction.
Dick Eastman was the exception,
putting forth a theory that Flight 77 approached the Pentagon,
and then overflew it, hidden by a rapid succession of events
including explosions, flashes, smoke, and other aircraft.