And that was necessary because????
You cannot even do that in this country, much less a dicey place like that.
Either someone in that car wanted a incident, or they were as dumb as rocks.
Without having the facts, I can't comment on why they might have possibly been under the impression that they had been given permission to bypass or be waived through the checkpoint. I have no idea how clogged up or busy the checkpoint was. Perhaps, the Italians thought there was some danger involved in being in a long queque and just decided to go to the head of the line. We can speculate all kinds of things, but of this I can be fairly certain, neither the Americans or the Italian agents wanted this to happen. It was not intentional.
Occam's Razor would suggest the dumb as rocks theory.
None of the checkpoints are straight through shots, all are serpentine. But one might not know about that before hand.