I can also tell you, without any doubt or hesitation, there are people like me, and quite a few, who, from our first class or seats up towards the front of the aircraft, watch every person who comes on board a flight with a skeptical eye and who will act upon any disturbance.
And I will also say, that will never be restricted to a nationality but to anyone who values their life.
“...I can tell you that there are many nationalities coming into the States. Moreover, the A330 widebody, especially where he was sitting, was on the far side meaning only someone within 3-4 rows would even be able to reach them and they would have to be on the aisle. That means you’ve now restricted your choices to roughly 6 people to act...”
So I presume from the above that those who initially assumed it was Americans who nailed the terrorist are also in error?