Oldest mistake in the book: since the adversaries dress differently, speak a different language, and are a different race, assume they must be idiots.
The WSJ reporter fell into the same trap: Iraqis and Afghans couldn't have figured out how to tap a video feed on their own; they must have had Iranian help.
"At times, they acted like amateurs," Dani said, listing some ways the Serbs managed to breach NATO communications security, including eavesdropping on pilots' conversations with AWACS surveillance planes.
OK, so they shot a smaller, faster moving target. The original point still stands.
It was an F-117. Yes, most "F" aircraft are air-to-air fighter aircraft. However F-117 is mostly used to attack ground targets, so it's "F" should be more like an "A" (If you want to nitpick that is ;-) )
I rather think it was the classic pointy-haired boss mistake. "I can't understand this video feed stuff, so those towel-heads shouldn't be able to either!"