Coach Sean McDermott's 9/11 reference. Any justification?

I am a Bills fan, but certainly found his reference an uncomfortable one. He said he commented on the 9/11 terrorists in reference to their ability to communicate and function well as a team. I can understand why the terrorists needed to be on top of their game to get past our government's defenses on many levels, but what other references could he have made instead? I assume a military precision reference was what he was going for. Maybe he would of just as easily gone with the raid on Bin Laden's compound, but it didn't occur in time for meeting? He has been a good coach and generally kept us in playoffs over 6 years. Was this an honest mistake? I don't doubt his sincerity on regretting the reference.