Yes, I saw that and it's indeed unfortunate. I don't know if it was the reason for Air Force's postgame stupidity or not but I do know it wasn't an issue until AF lost the game. Army and Navy have been pulling "mascot pranks" on each other for over a century but Air Force has been immune to those until now. As far as Army, this comes under the heading of "good initiative--bad judgment." I do hope the Falcon doesn't have to be euthanized because they are truly magnificent birds.
That said, I still think the post-game incident was just AF being sore losers. My initial post omitted the fact that at least one AF player flipped off the Army team as well as stadium security. The historical reality is that the AF guys have often tended to the punkish side but, since they've beaten us so frequently, we couldn't say very much.
I believe the heart of the matter is that Air Force knows they're the third wheel of service academy football. They'll never have the tradition and prestige of Army/Navy so they believe they can compensate by winning the CIC Trophy. When that doesn't happen, you get what you saw yesterday. The bottom line is that they can't deal with being beaten by a team they've historically dominated.