Because if it looks like a duck, swims like a duck, and quacks like a duck, then it might be an anteater?
“I’m innocent! I swear to Allah, somebody just asked me to drive this tanker truck. I didn’t see his face. I don’t know his name! I was just following orders!”
“All right, get oudda heah. Beat it. Don’t let me see yer ugly mug around here again.”
*** the drivers themselves were not thought to be jihadists.”***
I still get thrill watching US aircraft shoot up train loads of Nazi supplies in WWII France. I doubt if the train engineers were lockstep Nazis.
Same for submarine warfare.