In 1979 and 1980, I worked for Northrop Corp in Dhahran, as an instructor for RSAF avionics technicians on the F-5E/F. One day a spare part was ordered from the forward supply point. The item was an azimuth indicator for a radar warning receiver. When it arrived and was opened, accompanied with quite a buzz as all the techs gathered around and stared at the opened package, just chattering away. I went over to see what was up and one of the technicians just pointed at the box and said, "We aren't supposed to get parts from Israel!" I examined the box and could not figure out what he meant because the item was shipped directly from the U.S. to Dhahran, S.A., for the F-5 program (Peace Hawk).
"No, No!", he said. "Look!" I had removed the package from the box and he was pointing to the empty shipping box. When I finally understood the problem, it was the design cut in the dark gray foam that protected the indicator while in the box during shipment. The design was a perfect six-pointed star, as in Star of David. It was a simple, logical design that served its purpose, but the six-pointed star was a BIG no-no. The item was boxed back up (none of them would touch it) and returned to supply with a note in Arabic. No Saudis would touch the damn thing and only foreigners were permitted to handle the box.
Supply was purged of these items and a new package was used that had a different design in the foam cutout. Its all a plot you see. They were suspicious about that for as long as I was there.
There is a similar story about the Saudia Airlines logo design painted on the vertical stabilizer of the Saudia 747 fleet! If one looked verrrry closely, one could make out a Christian cross in the stylized design. Ooops! repaint the vert stabs in the fleet. No kidding.