I say this not as the dirty, commie liberal that I am...but, as the airline employee who has dealt with somewhat similar situations: "Ahhhh, xenophobia at it's finest".
I have seen bags belonging to Middle Eastern passengers (always to NY-LaGuardia, for some reason) rip apart on the ramp from overloading...and, you wouldn't believe some of the weird crap that has come falling out. Quite literally, a kitchen sink fell out of one. I can't speak to the reasoning or possible cultural difference, but oddly bound and just plain odd items are in people's baggage all the time.
Stupid crap like this, and worse, happens every single day. The stories I could tell of security breaches and diversions due to security issues that never make the news. And, if these were white guys, it would never have made the news. Ask me how many hidden, undeclared guns, ammunition, and knives the TSA confiscated, reported, and turned over to us (almost always belonging to white males). Who knows what these mens' intentions were...that won't stop xenophobic America from speculating. Of course, who knows what the intentions of those middle-aged, white males trying to take their "more traditional" weapons with them could have been...but, we won't bat an eye because they're "one of us".